This document presents a digital visitor counter project by four students from the ECE department of Greater Kolkata College of Engineering and Management. The project uses sensors and a microcontroller to detect people entering and exiting a room and displays the count on an LCD screen. It works by using IR sensors to detect motion and an AT89C52 microcontroller to process the sensor signals and control the LCD display. The document discusses the components, working principle, applications and advantages of the digital visitor counter.

1. PRESENTED BY :-
PARAMA GHOSH(26)
ASHISH KUMAR(27)
ANANYA MANDAL(28)
MOUMITA DEY(22)
ECE DEPARTMENT OF GREATER KOLKATA COLLEGE OF
ENGINEERING AND MANAGEMENT,KOLKATA

2. ACKNOWLEDGEMENT
We wish to express our thanks to Prof. Gour Gopal Jana (ECE
Dept.),Greater Kolkata College of Engineering & Management .
Our greatest thanks go to our teachers especially Prof. Sunipa Kundu
, (ECE Dept.) for all the suggestions made and for their
encouragement and support during the preparation of this technical
Presentation.
Our thanks is also due to our family members and some friends for
their constant encouragement and enthusiasm time to time.
Date :24 NOVEMBER,2014

3. CONTENT
 INTRODUCTION
 BLOCK DIAGRAM
 CIRCUIT DIAGRAM
 WORKING PRINCIPLE
 COMPONENTS
 APPLICATIONS
 ADVANTAGES
 CONCLUSION
 REFERENCES

4. INTRODUCTION
 Controller based model to count number of persons visiting
particular room .
It receives the signals from the sensors.
Signal is operated under the control of software which is stored
in ROM
All program is monitor by microcontroller AT 89C52

5. Block Diagram
Sensors
Display
Microcontroller
Logical
Unit
Power
Supply 5V

6. CIRCUIT DIAGRAM

7. WORKING PRINCIPLE
 This counter Sensor consist of 3 Section
 Detect Object (Sensor)
o Data Processing (CPU)
o Display by LCD /7 SEGMENT module.
o Count number of person enter and exit from room.

8. COMPONENTS
 IC1 - LM324 quad op-amp
 IC2 - 74LS76 J-K flip-flop
 IC3 - AT89C52
 T1, T2 - npn phototransistor
 T3, T4 - npn transistor
 IR TX1, IR TX2 - IR
transmitting LED
 Capacitors:
 XTAL - 12MHz crystal
 X1 - 230V primary to 7.5V
 BR1 - 1A bridge rectifier
 DIS1-DIS3 - LTS543 CC 7-
segment
display
 Resistors (all ¼-watt, ±5%
carbon):

9. MICROCONTROLLER(AT89C52)

10. INTERNAL BLOCKS OF MICROCONTROLLER 89C52

11. CAPACITOR
 Store energy
 Application
Motor starters, Tuned circuits, Sensing, Oscillators, Signal
processing, High-pass and low-pass filters
 connections

12. IR TRANSMITER AND RECEIVER
 Receiver connect with 5V
 Signal comes then outputs is low.
 LED is use for transmission.
 Operate with 5V.

13. OTHER COMPONENT
 Message display in LCD
 Flip flop use for two stable state
 Crystal is use for electrical signal

14. APPLICATIONS
 Auditorium
 Conference halls
 Multiplex
 Offices
 Sports venue

15. ADVANTAGES
 No need of human intervention.
 Can work 24x7 without any problem.
 Low cost and very easy to implement

16. CONCLUSION
 We just took up this project as we were interested in electronics
and wanted to learn about it. Through this project, we learnt a
lot about the functioning and use of different electronic
components and their applications in real life. We were able to
correlate what we studied in our course to real life.
 Also this is very simple and effective idea which can be used in
many places like hostel and hotel rooms to save energy.
 Thanks to our faculty for guiding us in this project.
CONCLUSION

17. REFERENCES
 www.howstuffworks.com
 www.dnatechindia.com
 www.answers.com
 http://youthworldcom.blogspot.in/p/digital-visitor-
counter.html
Magazines:
 Electronics for you
 Electrikindia