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.

1. Course instructor: RETHWAN FAIZ
GROUP #08
Project Title
ELECTRONIC EYE CONTROLLED SECURITY SYSTEM

2. Group Member
Presented by,
1)Barman, Manoz 14-27882-3
2)Himel, Mahbub Alam 14-28036-3
3)Rahman, Ashikur 13-23293-1
4)Ahmed, Emran 14-26236-1

3. 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

4. PROJECT BLOCK DIAGRAM

5. •BATTERY
•IC 4060 BINARY COUNTER/DIVIDER
•LDR
•BC548 –NPN TRANSISTOR
•RELAY
•BUZZER
•PUSH BUTTONS
•RESISTORS
•CAPACITORS
•LED
HARDWARE COMPONENTS

6. 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

7. 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.

8. FUNCTIONAL DIAGRAMFEATURES
 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

9. 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.

10. 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

11. BC548
The 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

12. RELAY
IT IS A ELECTRO MAGNETIC SWITCH
USED TO CONTROL THE ELECTRICAL DEVICES
COPPER CORE MAGNETIC FLUX PLAYS MAIN ROLE HERE

13. 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

14. 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

15. 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

16. QUERIES ?

17. THANKYOU