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PREPARED BY

RATUL PAUL(08122003049)
SAMOSHRI MITRA(08122003058)
DEBAPAM DAS(081220030)
ARNAB BISWAS(08122003023)

UNDER THE GUIDANCE OF
Prof. Ramanath Dutta

Department of Electronics and Communication Engineering
ST. THOMAS’ COLLEGE OF ENGINEERING & TECHNOLOGY
4 Diamond Harbour Road, Kidderpore Kolkata 700 023
CERTIFICATE

Department of Electronics and Communication Engineering

ST. THOMAS’ COLLEGE OF ENGINEERING &TECHNOLOGY, KOLKATA

This to certify that the work in preparing the project entitled “________________________________________________________________” has been carried out by Ratul Paul , Samoshri Mitra, Debapam Das, Arnab Biswas under my guidance during the session 2011-12 and accepted in partial fulfillment of the requirement for the degree, Bachelor of Technology of West Bengal University of Technology.

_________________
Signature of Mentor

_____________________________
Signature of Head of the Department

__________________
Signature of Principal
PROJECT REPORT

DEPARTMENT OF
ELECTRONICS AND COMMUNICATION ENGINEERING

ST. THOMAS’ COLLEGE OF ENGINEERING &TECHNOLOGY

AFFILIATED TO

WEST BENGAL UNIVERSITY OF TECHNOLOGY
MAY 2012
To be submitted in partial fulfillment of the requirements for the degree of B.TECH

Acknowledgement

We express our sincere gratitude to Prof. Supriyo Sengupta (H.O.D, Electronics & Communication Engineering Department, St. Thomas’ College of Engineering & Technology) under whose guideline we are performing our project. We are whole heartedly thankful to him for giving us his valuable time & attention & for providing us a systematic way for performing the works of our project time to time. We have immense pleasure in expressing our whole hearted gratitude to Prof. R.N.Datta (Professor, Electronics & Communication Engineering Department, St. Thomas’ College of Engineering & Technology) & all the laboratory maintenance staff for providing us assistance in various hardware & software problems encountered during the course of the project.

______________________________________________
RATUL PAUL SAMOSHRI MITRA

______________________________________________
DEBAPAM DAS ARNAB BISWAS

Contents
1. Introduction
2. Objective
3. Block diagram
4. Sensor circuit
5.1. LASER Transmission
5.2.1. Introduction of LASER
5.2. LASER Detection
5.3.2. LASER Detection Circuit
5.3.3. Circuit description
5.3.4. Component description
5.3.5.1. LDR
5.3.5.2. Comparator IC LM358
5. Siren circuit
6.3. PWM siren signal generation
6.4.5. Siren signal generation circuit
6.4.6. Circuit description
6.4.7. Emitter follower
6.4.8. Component description
6.4.9.3. NE555 timer ic
6.4. ASK transmitter & receiver
6.5. Amplification of the siren signal
6.6.9. Circuit Diagram
6.6.10. Circuit description
6.6.11. Current amplifier (Class B push pull amplifier) 6.6.12. Component description
6.6.13.4. PNP CK100 and NPN CL100 transistor
6.6.13.5. Speaker
6.6.13.6. Lm 358
6. Microcontroller
7.6. Introduction
7.7. Pin diagram
7.8. Block diagram of parts that the microcontroller handles 7.9. Function of the microcontroller
7. Programming and software
8.10. C programming
8.11. Software platform
8.12.13. AVR studio4
8.12.14. WinAvr
8.12.15. Extreme burner & burning kit
8. Telephone circuitry
9.12. DTMF
9.13. DTMF tone generator ic UM91214b
9.14. DTMF keypad
9.15. Telephone line Off Hook circuitry
9. Conclusion...
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