DESIGN AND CONSTRUCTION OF A 3 WAY INTER-COMMUNICATION SYSTEM
By
AMUGO UGOCHUKWU. C EE/H2003/067
Presented To
Department of Electrical/Electronic Engineering
ABSTRACT
An intercommunication system is nothing but the communication between two or more persons not close to one another. This does not mean we should categorize telephones, fax, teleprinters, telegraphs etc. an example of intercom system sine they are used in communication between people. Infact, intercom involves short distance places. It is limited in electronics, offices, and hospitals.
The intercom system under is a three way station type. This means that a person can communicate to the other at another station at his own convenient time. They call once another attention by the use of the tone generated by the use of tone generator.
Depress a button and the tone sounds, and the same switch is thrown to the intercom circuit thus they communicate.
This system to be used in solving the problem of poor communication in our department. Besides, it can be extended to some other offices by the addition this one may use a rotary switch
TABLE OF CONTENT
Title page
Certification
Dedication
Acknowledgement
Abstract
Table of contents
CHAPTER ONE
1.0 INTRODUCTION
CHAPTER TWO
Complete Circuit Description
2.0 Simplified block diagram of thee 3-way intercom system
2.1 Operation Principles
CHAPTER THREE
3.0 ICC1212C
3.1 Resistor
3.2 Capacitor
3.3 Condenser Microphone
3.4 Loudspeakers
3.5 Switches
3.6 Communication cables
CHAPTER FOUR
CIRCUITRY DESIGN AND DESCRIPTION
4.0 Description of Power Supply Unit Circuit
4.1 Description of the tone Generator Circuit
4.2 Circuit Diagram of the Three Units and Explanation
4.3 Explanation of the Switching Circuit
CHAPTER FIVE
CONSTRUCTION AND PACKAGING
5.0 Component Sourcing
5.1 Construction and Testing
5.2 Audio Amplifying Stage
5.3 Prototype
5.4 Trouble shooting
5.5 Packaging
CHAPTER SIX
6.0 CONCLUSION
6.1 Further study and Design
REFERENCE
APPENDIX
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