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

COMPLETE MATERIAL COST 5000.

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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

 

 

 

CHAPTER ONE

 

INTRODUCTION

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