Wireless Communication for Class Room Monitoring With Notice Board Display

WIRELESS COMMUNICATION FOR CLASS ROOM WIRELESS COMMUNICATION FOR CLASS ROOM MONITORING WITH NOTICE BOARD DISPLAYMONITORING WITH NOTICE BOARD DISPLAY

Internal guide:Internal guide:Mr.RASHED NAWAZ KHANMr.RASHED NAWAZ KHAN

BYBYN PRANEETH 08J01A0491 N PRANEETH 08J01A0491

E SANTOSH 08J01A04B0E SANTOSH 08J01A04B0

MOHD FAYAZ 08J01A04B8MOHD FAYAZ 08J01A04B8

SHAIK IFTHEQEUAR ALI 08J01A0469SHAIK IFTHEQEUAR ALI 08J01A0469

Aim of the projectAim of the project

To implement class room attendance system with indoor To implement class room attendance system with indoor temperature and information display using embedded systemstemperature and information display using embedded systems

Usage of wireless RF technologyUsage of wireless RF technology

Usage of IR sensorsUsage of IR sensors

INTRODUCTION TO EMBEDDED INTRODUCTION TO EMBEDDED SYSTEMSSYSTEMS

Embedded System is a combination of hardware and Embedded System is a combination of hardware and software used to achieve a single specific task . An embedded software used to achieve a single specific task . An embedded system is a microcontroller-based, software driven, reliable, system is a microcontroller-based, software driven, reliable, real-time control system, autonomous, or human or network real-time control system, autonomous, or human or network interactive, operating on diverse physical variables and in interactive, operating on diverse physical variables and in diverse environments and sold into a competitive and cost diverse environments and sold into a competitive and cost conscious market. So in this project we are going to get the conscious market. So in this project we are going to get the result by using this embedded systems only. result by using this embedded systems only.

Major building blocksMajor building blocks

Micro controllerMicro controller power supply unitpower supply unit Regulated unitRegulated unit RF TransmitterRF Transmitter RF RecieverRF Reciever Keypad unit Keypad unit LCD ScreenLCD Screen IR sensorsIR sensors

Block Diagram of TransmitterBlock Diagram of Transmitter

Block Diagram of RecieverBlock Diagram of Reciever

Microcontrollers are “special purpose computers”.Microcontrollers are “special purpose computers”.

The Microcontroller includes a CPU, RAM, ROM, The Microcontroller includes a CPU, RAM, ROM, I/O ports, Timers etc.., like a standard computer, but I/O ports, Timers etc.., like a standard computer, but on a single silicon chip.on a single silicon chip.

Microcontroller based systems are designed to Microcontroller based systems are designed to perform a specified task.perform a specified task.

Micro controllerMicro controller

Types of MicrocontrollersTypes of Microcontrollers

We have many types of microcontrollers in markets in that few We have many types of microcontrollers in markets in that few are given beloware given below

AT MEGA microcontrollerAT MEGA microcontroller PIC microcontrollerPIC microcontroller ASIC (application specific microcontroller)ASIC (application specific microcontroller)

Compare to all controllers PIC microcontroller have more Compare to all controllers PIC microcontroller have more advantages.advantages. The Microcontroller used in the project is PIC The Microcontroller used in the project is PIC Microcontroller developed by Microchip Incorporation .Microcontroller developed by Microchip Incorporation .

PIC microcontrollerPIC microcontroller

PIC is a family of Harvard architecture microcontrollers made PIC is a family of Harvard architecture microcontrollers made by Microchip Technology, derived from the PIC1640 by Microchip Technology, derived from the PIC1640 originally developed by General Instrument's Microelectronics originally developed by General Instrument's Microelectronics Division. The name PIC initially referred to "PeripheralDivision. The name PIC initially referred to "Peripheral InterfaceInterface Controller".Controller".

A PIC's instructions vary from about 35 instructions for the A PIC's instructions vary from about 35 instructions for the low-end PICs to over 80 instructions for the high-end PICs. low-end PICs to over 80 instructions for the high-end PICs. The instruction set includes instructions to perform a variety The instruction set includes instructions to perform a variety of operations on registers directly, the accumulator and a of operations on registers directly, the accumulator and a literal constant or the accumulator and a register, as well as for literal constant or the accumulator and a register, as well as for conditional execution, and program branching.conditional execution, and program branching.

Advantages of Micro controllerAdvantages of Micro controller

Low costLow cost User friendlyUser friendly Easily available in marketEasily available in market We can reprogram it up to 1000 timesWe can reprogram it up to 1000 times Less power consumptionLess power consumption Gather input from various sensorsGather input from various sensors RAM and ROM are inbuilt in the MCRAM and ROM are inbuilt in the MC

Applications of Micro controllerApplications of Micro controller

Cell phones.Cell phones.

Computers.Computers.

RobotsRobots

Interfacing to two pc’sInterfacing to two pc’s

power supply unitpower supply unit

The major blocks of power supply unit are given belowThe major blocks of power supply unit are given below Step down TransformerStep down Transformer Rectifier unitRectifier unit Input filter Input filter Output filterOutput filter

Regulator unitRegulator unit

Transformer Transformer Transformer is a electromagnetic device which induces Transformer is a electromagnetic device which induces

the voltage due to magnetic field present between primary the voltage due to magnetic field present between primary and secondary windings.and secondary windings.

It has two windings called as primary winding and It has two windings called as primary winding and secondary winding. We are giving input 230v input secondary winding. We are giving input 230v input voltage at primary side. The output of transformer is voltage at primary side. The output of transformer is 9v(ac only).9v(ac only).

In this project we are using 9v step down transformerIn this project we are using 9v step down transformer

We have two types of transformersWe have two types of transformers

1)1) Step up transformer.Step up transformer.

2)2) Step down transformer.Step down transformer.

Step up transformer:Step up transformer: This transformer will step up the voltage that is This transformer will step up the voltage that is

this transformer will increase the voltage.this transformer will increase the voltage.

Step down transformer:Step down transformer: This type of transformers will step down the This type of transformers will step down the

voltage. That is this will convert high voltage in voltage. That is this will convert high voltage in to low voltage.to low voltage.

Mostly for project purpose we are using only Mostly for project purpose we are using only step down transformer. step down transformer.

Rectifier Rectifier

Rectifier is circuit which converts the ac in to dc. We have Rectifier is circuit which converts the ac in to dc. We have two types of rectifier.two types of rectifier.

1.1. Full wave rectifierFull wave rectifier

2.2. Half wave rectifierHalf wave rectifier

Full wave rectifier again classified as followsFull wave rectifier again classified as follows

1.1. Bridge rectifierBridge rectifier

2.2. Cetertapped full wave rectifierCetertapped full wave rectifier

In this project we are using bridge rectifier because the In this project we are using bridge rectifier because the efficiency of the bridge rectifier is high compare to all efficiency of the bridge rectifier is high compare to all rectifiers.rectifiers.

FiltersFilters

The output of rectifier is not pure DC. It may contain some The output of rectifier is not pure DC. It may contain some ripple components that is pulsating DC. To eliminate this ripple components that is pulsating DC. To eliminate this ripple components which are present in output we are using ripple components which are present in output we are using filter.filter.

Filter is a circuit which is used to eliminate the ripples present Filter is a circuit which is used to eliminate the ripples present in rectified output.in rectified output.

We have many types of filters.We have many types of filters.

Most of the power supplies are using capacitor filter to filter Most of the power supplies are using capacitor filter to filter out the ripples present in output.out the ripples present in output.

Regulator unit Regulator unit

Regulator regulates the output voltage to be always Regulator regulates the output voltage to be always constant. The output voltage is maintained irrespective of constant. The output voltage is maintained irrespective of the fluctuations in the input AC voltage. As and then the the fluctuations in the input AC voltage. As and then the AC voltage changes, the DC voltage also changes. Thus AC voltage changes, the DC voltage also changes. Thus to avoid this Regulators are used. to avoid this Regulators are used.

The regulators are mainly classified for low voltage and The regulators are mainly classified for low voltage and for high voltage. Further they can also be classified as: for high voltage. Further they can also be classified as:

Positive regulator and Negative regulator. Positive Positive regulator and Negative regulator. Positive regulator regulates the Positive voltage and Negative regulator regulates the Positive voltage and Negative regulator regulates the Negative voltage. Each regulator regulator regulates the Negative voltage. Each regulator consists of 3-pins. They are: 1.Ground pinconsists of 3-pins. They are: 1.Ground pin

2.Input pin2.Input pin

3.Output pin3.Output pin

Keypad unitKeypad unit

It consists of four buttons or keys to press, They It consists of four buttons or keys to press, They are :are :

Reset buttonReset button Two are binary buttons (0’s and 1’s)Two are binary buttons (0’s and 1’s) clear buttonclear button By using all the above buttons only we can give By using all the above buttons only we can give

the input to the transmitter . the input to the transmitter .

LCD DisplayLCD Display Liquid crystal display (LCD) has material which combines Liquid crystal display (LCD) has material which combines

the properties of both liquid and crystals. They have a the properties of both liquid and crystals. They have a temperature range within which the molecules are temperature range within which the molecules are almost as mobile as they would be in a liquid, but are almost as mobile as they would be in a liquid, but are grouped together in an order form similar to a crystal grouped together in an order form similar to a crystal

More microcontroller devices are using 'smart LCD' More microcontroller devices are using 'smart LCD' displays to output visual information. The following displays to output visual information. The following discussion covers the connection of a Hitachi LCD discussion covers the connection of a Hitachi LCD display to a PIC microcontroller.It is used to display the display to a PIC microcontroller.It is used to display the output .output .

Software’s used Software’s used

Mp lab SoftwareMp lab Software

PIC-C compiler for Embedded ‘C’ PIC-C compiler for Embedded ‘C’ programming.programming.

PIC kit 2 programmer for dumping code into PIC kit 2 programmer for dumping code into Microcontroller.Microcontroller.

MicrocontrollerMicrocontroller programmerprogrammer

To dump the generated hex To dump the generated hex file after compiling the file after compiling the program written in PIC C program written in PIC C compiler, PIC USB compiler, PIC USB programmer is used.programmer is used.

PIC USB programmer comes PIC USB programmer comes with a support software PIC kit with a support software PIC kit 2 or MP lab .2 or MP lab .

AdvantagesAdvantages

The usage of RF Module decreases the manual work by The usage of RF Module decreases the manual work by sending a circular to every class and take sign on it by class sending a circular to every class and take sign on it by class teacher. teacher.

It will reducing the human strains and to increase the It will reducing the human strains and to increase the quality of work by the implementation of the automated quality of work by the implementation of the automated machine.machine.

This projectThis project ‘ ‘WIRELESS COMMUNICATION FOR CLASS WIRELESS COMMUNICATION FOR CLASS

ROOM MONITORING WITH NOTICE BOARD DISPLAY’ ROOM MONITORING WITH NOTICE BOARD DISPLAY’ is is used in industrial electrical outlets for power control over used in industrial electrical outlets for power control over the loads.the loads.

Future scope of this projectFuture scope of this project

Fitted with a wireless camera it can be used for Fitted with a wireless camera it can be used for

surveillance purposes.surveillance purposes.

It can also be enhanced to count the students It can also be enhanced to count the students by using a smart card reader and also by by using a smart card reader and also by maintaining a data base to store the maintaining a data base to store the attendance.attendance.