MICROCONTROLLER BASED DIGITAL VISITOR

COUNTER

A technical seminar report submitted to JNTUH in the partial fulfillment of the

requirements for the award of the degree of

BACHELOR OF TECHNOLOGY

In

ELECTRONICS AND COMMUNICATION ENGINEERING

By

K. VAMSHI - 12631A04A6

Under the esteemed guidance of

S. NAGESWARA RAO M.Tech, (Ph.D)

Associate Professor in ECE Dept.

Department of Electronics and Communication Engineering

SRI VENKATESWARA ENGINEERING COLLEGE

(SPONSORED BY THE EXHIBITION SOCIETY, HYD)

(Affiliated to Jawaharlal Nehru Technological University, HYD)

SURYAPET, NALGONDA (Dist.), T.S.

2015 - 2016.

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DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING

SRI VENKATESWARA ENGINEERING COLLEGE

SURYAPET-508213

CERTIFICATE

CERTIFICATE

This is to certify that the technical seminar entitled

“MICROCONTROLLER BASED DIGITAL VISITOR COUNTER” is the bonafide

work done by K. VAMSHI (12631A04A6) in partial fulfillment of the requirements for the

award of BACHELOR OF TECHNOLOGY in Electronics and Communication

Engineering by J.N.T.University, Hyderabad during the academic year 2015-2016.

Guide Head of the

Department

S. NAGESWARA RAO, T. SRINIVAS,

Asst. Professor. Asst. Professor.

External Examiner Principal

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DECLARATION

I am K. VAMSHI student of B.TECH. In ELECTRONICS AND

COMMUNICATION ENGINEERING of Sri Venkateswara Engineering College, Suryapet,

bearing H.T. No 12631A04A6 by declare that the technical seminar with title

“MICROCONTROLLER BASED DIGITAL VISITOR COUNTER” is the original

work done by me.

To the best of my knowledge and belief me here by declare that this seminar bears no

resemblance to any other seminar submitted at Sri Venkateswara Engineering College,

Suryapet or any other college affiliated to Jawaharlal Nehru Technological University,

Hyderabad for the award of the degree.

Place:

Date:

Signature of the candidate

K. VAMSHI (12631A04A6).

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ACKNOWLEDGEMENT

I thank the almighty for giving me the courage and perseverance in completing this

seminar. This seminar itself is an acknowledgement for all those people who given this

seminar a success.

I am thankful to Dr. A. SRUJANA, Principal S.V.E.C. for providing excellent

facilities, motivation and encouragement to complete the seminar work in time.

It is my privilege to thank Mr. T. SRINIVAS, Asst. Prof. I/C HOD of ECE

Department for his encouragement during the progress of this seminar work.

I take this opportunity to express our deep and sincere gratitude to the seminar guide

Mr. S. NAGESWARA RAO, Asst. Prof. for the valuable advices at every stage of this work.

Without his supervision and valuable guidance we never have come out in this form.

Last but not least I would like to express my deep sense of gratitude and earnest

thanks giving to my parents for their moral support and heartfelt cooperation in completing

this seminar. I would also like to thank all the teaching and non-teaching staff and my friends

whose direct or indirect has helped me to complete this work successfully.

Seminar associate

K. VAMSHI - 12631A04A6

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MICROCONTROLLER BASED DIGITAL VISITOR

COUNTER

ABSTRACT :

Digital visitor counter is a reliable circuit that takes over the task of counting number

of Persons/ Visitors in the Room very accurately. When somebody enters into the Room then

the Counter is Incremented by one. The total number of Persons inside the Room is

displayed on the seven segment display module. The microcontroller does the above job it

receives the signals from the sensors, and this signals operated under the control of software

which is stored in ROM.

This seminar we will create counter system for apply. The total number of object is

displayed on the seven segment display. The system is fully controlled by the 16 bit

microcontroller AT89C2051 which has a 4Kbytes of ROM for the program memory.

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CONTENTS

CHAPTER PAGE NO.

1. INTRODUCTION 1

2. DESCRIPTION 2-14

2.1. Block Diagram 2

2.2. Circuit Diagram 3

2.3. Microcontroller AT89C2051 4

2.4. IR Sensor 9

2.5. Timer IC(555) 11

2.6. Seven Segment Display 13

3. POWER SUPPLY 15-23

3.1. Transformer 15

3.2. Rectifier 20

3.3. Filter 22

3.4. Regulator 22

4. APPLICATIONS 24

5. ADVANTAGES & DISADVANTAGES 25

6. FUTURE SCOPE 26

7. CONCLUSION 27

8. BIBLIOGRAPHY 28

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LIST OF FIGURES AND TABLES

FIGURES: PAGE NO.

2.1: Block Diagram 2

2.2: Circuit Diagram 3

2.3: Block diagram of AT89C2051 5

2.4: Pin Configuration of AT89C2051 6

2.5: IR Sensor 9

2.6: Pin Diagram of Timer IC 11

2.7: Monostable Circuit 12

2.8: Astable Mode 13

2.9: Seven Segment Display 14

3.1: Transformer Symbol 15

3.2. Transformer 16

3.3. Basic Principle of Transformer 16

3.4. Basic Transformer 17

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3.5. Step-Down Transformer 19

3.6. Step-Up Transformer 19

3.7. Bridge Rectifier 20

3.8. Positive Half Cycle of Bridge Rectifier 21

3.9. Negative Half Cycle of Bridge Rectifier 21

3.10. Charging and Discharging of a Capacitor 22

3.11. Voltage Regulator 23

TABLES

2.1: Special features of AT89C2051 serve by Port 3 7

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