THE DESIGN AND CONSTRUCTION OF A 40 WATT HI-FI AMPLIFIER – Complete Project Material

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THE DESIGN AND CONSTRUCTION OF A 40 WATT HI-FI AMPLIFIER

By

AMOS NSIKAN EE/H2003/094

Presented To

Department of Electrical/Electronic Engineering

High power amplifier are usually quite costly and usually beyond the easy reach of most audio enthusiastic (and Hi-Fi  buffs) who then have to remain satisfied with those small 6 watt amplifiers. Well, with this introduction to us and to electronics, things should change. Well this low cost Hi-Fi amplifier that delivers ear chatting and thundering output of an unbelievable forty watts. The unique features of this circuit are.

  • Low cost – The basic criteria 
  • Compact size
  • Very low transient noise on “power on” and low THO
  • Effective Bass and treble controls
  • Automatic thermal shut down system it switches off the amplifier in case of overheating
  • Load damp protection in built.

The circuit uses a high power amplifier chip viz the LA 4440. the circuit is quite self explanatory. The input is coupled by a small value capacitor. The output is taken through a block terminal and fed to the speaker.

TABLE OF CONTENT

Approval page

Dedication

Acknowledgement

Table of content

CHAPTER ONE

Introduction

CHAPTER TWO

Components Explanation

Capacitor

Value of a capacitor

Tolerance

Working voltage

Leakage current

Component and Operation of a Capacitor

Resistor

Printed Circuit Board

Loudspeaker

Cabinet Screen

Heat Sink

Variable Resistor

Integrated Circuit

Diode

CHAPTER THREE

Diagrams of project 

Operation manual

CHAPTER FOUR

Construction

Economic of the project

Reliability

Maintainability

Testing

CHAPTER FIVE

Conclusion

Bibliography

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