Electronic Eye Controlled Security System Mid Presentation

Course instructor: RETHWAN FAIZ

GROUP #08

Project Title

ELECTRONIC EYE CONTROLLED SECURITY SYSTEM

Group Member

Presented by,

1)Barman, Manoz 14-27882-32)Himel, Mahbub Alam 14-28036-33)Rahman, Ashikur 13-23293-14)Ahmed, Emran 14-26236-1

Here is a smart security circuit for your cash box that thwarts the theft

attempt by activating an emergency beeper. A battery is provided to

supply the power to the circuit with help of a switch. when cash box is

closed LDR in dark state resets the IC CD4060 which goes low and has

no impact on BC547 results Relay in off condition. When LDR in

bright mode, counter will start counting and oscillates resulting both

transistors in ON condition indicating load ON and buzzer will blow.

This circuit is mainly useful at Banks,Hotels,shopping malls, household

appliances..etc

ABSTARCT

PROJECT BLOCK DIAGRAM

•BATTERY

•IC 4060 BINARY COUNTER/DIVIDER

•LDR

•BC548 –NPN TRANSISTOR

•RELAY

•BUZZER

•PUSH BUTTONS

•RESISTORS

•CAPACITORS

•LED

HARDWARE COMPONENTS

BATTERY

An electrical battery is a combination

of one or more electrochemical cells,

used to convert stored chemical energy

into electrical energy. The battery has become a common

power source for many household,

robotics and industrial applications.Larger batteries provide standby

power for telephone exchanges or

computer data centers

CD4060 (RIPPLE BINARY COUNTER/DIVIDER)

CD4060 consists of an oscillator section and 14 ripple

carry binary counter stages. The oscillator configuration allows design of either RC

or crystal oscillator circuits. A RESET input is provided which resets the counter

to the all O’s state and disables the oscillator. All counter stages are master slave flip-flops. All

inputs and outputs are fully buffered. Schmitt trigger action on the input pulse line permits

unlimited input pulse rise and fall times.

FUNCTIONAL DIAGRAM

FEATURES

High Voltage Type (20V Rating)

Common Reset

12MHz Clock Rate at 15V

Fully Static Operation

Buffered Inputs and Outputs

Schmitt Trigger Input Pulse Line

Standardized, Symmetrical Output

Characteristics

100% Tested for Quiescent Current at

20V

5V, 10V and 15V Parametric Ratings

LDR(Light Dependent Resistor)

A photoresistor or light dependent resistor (LDR) is a

resistor whose resistance decreases with increasing incident

light intensity. It can also be referred to as

photoconductor.If light falling on the device, the photons absorbed by the

semiconductor give bound electrons enough energy to jump

into the conduction band. The resulting free electron (and its hole partner) conduct

electricity, thereby lowering resistance.

A photoelectric device can be either intrinsic or

extrinsic. An intrinsic semiconductor has its own

charge carriers and is not an efficient semiconductor,

e.g. silicon. Extrinsic devices have impurities, also called

dopants, added whose ground state energy is closer to

the conduction band; since the electrons do not have

as far to jump, lower energy photons (i.e., longer

wavelengths and lower frequencies) are sufficient to

trigger the device. Example of extrinsic devices is phosphorous atoms

BC548The BC548 transistor is an NPN Epitaxial

Silicon Transistor.

The BC548 transistor is a general-purpose

transistor in small plastic packages.

It is used in general-purpose switching and

amplification BC848/BC548 series 45 V, 100 mA

NPN general-purpose transistors.

Whenever base is high, then current starts

flowing through base and emitter and after that

only current will pass from collector to emitter 

RELAYIT IS A ELECTRO MAGNETIC SWITCH

USED TO CONTROL THE ELECTRICAL DEVICES

COPPER CORE MAGNETIC FLUX PLAYS MAIN ROLE HERE

The relay's switch connections are usually labeled COM, NC and

NO:

COM = Common, always connect to this; it is the moving part of

the itch.

NC = Normally Closed, COM is connected to this when the relay

coil is off.

NO = Normally Open, COM is connected to this when the relay

coil is on

Piezo Buzzer

This buzzer is an piezo type audio signaling device, which has a piezo

element and a oscillating circuit inside which oscillates the piezo brass base

plate, which when given voltage difference produces sound of a predefined

frequency.Features

These high reliability piezo buzzers are applicable to general electronics

equipment. Compact, pin terminal type Piezo buzzer with 4 KHz output. Pin type terminal construction enables direct mounting onto printed circuit

boards.

BUZZER

Working of Project

If the cash box is in closed condition the interior will be dark. Hence in the

dark, LDR1 resets CD4060 and it stops oscillating and counting. So neither the piezobuzzer sounds, nor the relay energizes, indicating that

the cash box is closed. If someone tries to open the door of the cash box, light most probably from

the burglar’s pen torch falls on LDR fitted into the cash box. As a result, LDR

conducts and goes low Hence pin 14 of IC1 goes high for two seconds after the door is opened and

goes low for another two seconds. So the piezobuzzer (PZ1) sounds for two

seconds and then falls silent for the following two seconds. This cycle repeats

until the cash box is closed

QUERIES ?

THANKYOU