1. A Seminar on ELECTRONIC EYE
Submitted By:
Soumya ranjan parida
Branch:-E.T.C
Regdno: 1

2. CONTENTS INTRODUCTION WORKING PRINCIPLE BLOCK DIAGRAM CIRCUIT DIAGRAM
COMPONENTS
OBSERVATION&ANALYSIS
FUTURE SCOPE
APPLICATION
CON CLUSION

3. Introduction Electronic eye has much use in this electronic age
Introduction Electronic eye has much use in this electronic age. Also known as magic eye. It can be used as an automatic guest indicator at the door, if fixed at the bottom of the door entrance. Once it is installed at the door there is no need to install a call bell. It can also be used at homes or in banks as a burglar alarm.

4. WORKING PRINCIPLE principle of working mainly depends on the LDR
LDR is a device which has a resistance which varies according to the amount of light falling on its surface

5. BLOCK DIAGRAM

6. Electronic eye structure

7. CIRCUIT DIAGRAM

8. COMPONENTS Resistors : R1 - 270K R2 - 12K R3 - LDR
Capacitor : C MFD
Semiconductors : Q1 - BC547
Q2 - BEL188
Miscellaneous : 3V Battery
Speaker

9. Cadmium Sulphide track
LDR-Light dependent resistor
Transistor BC NPN type
valence bands
conduction band band
band
gap
Cadmium Sulphide track
Transistor BEL PNP type

10. If The intensity of light is more the resistance of the LDR is less
If The intensity of light is less the resistance of the LDR is more
The two transistors BC547 and BEL188 both working together as a complimentary pair direct coupled amplifier. For oscillation of a circuit feedback amplifier Transistor BEL188 is collector giving of 0.2MFD of 12K resistor starts to pre transistor BC547.

11. OBSERVATION&ANALYSIS
Electronic eye circuit works as light intensity indicator.
Speaker will be activated.
Transistor BEL-188 is used to amplify the output signal

12. Characteristics of BEL-188 Vceo(min) - 15v Vcbo - 25v Vebo - 5v Vce - 1v Vcesat - 0.5v

13. FUTURE SCOPE
We can increase the range of this equipment by using better sensor.
We can use this as Remote Controller.

14. MERITS Low cost Easy to construct Portable Low power consumption
Real time applications

15. DEMERITS
It is difficult to work with this equipment if there is no sufficient lighting conditions.
Unnecessary disturbances may occur while using in the Apartments

16. APPLICATIONS It can also be used in banks as a burglar alarm.
It can be used as an automatic guest indicator at the door.
It can also be used in banks as a burglar alarm.
Electronic Eye is a vital component in any electric circuit which is to be turned on and off - for example, solar powered garden lights, and night security lighting.

17. An Electronic Eye can even be used in a simple remote control circuit using the backlight of a mobile phone to turn on a device
Once it is installed at the door there is no need to install a call bell.
Only 3V DC power supply is required for operating the circuit.

18. conclusion
Therefore we have reached the epilogue of this project and we have worked on this project because this provides many real time applications
So, it can be used in many security applications
Thus this Electronic Eye can detect the light intensity by using LDR(Light Dependent Resistor

19. THANK YOU