Design And Construction Of A Stereo Level Indicator

ABSTRACT

Usually, some amplifier does not come with audio level indicator such as a low-priced home stereo power amplifiers. An output power level indicator can be added to each channel of these stereo power amplifiers.

This work is on a very simple, low-cost stereo-level indicator circuit for home power amplifiers with power rating of around 0.5W. The circuit is built around two LM3915 dot/bar display driver ICs (IC1 and IC2). LM3915 senses analogue voltage levels to drive ten LEDs, providing a logarithmic 3dB/step analogue display.

TABLE OF CONTENTS

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWLEDGEMENT

ABSTRACT

TABLE OF CONTENT

CHAPTER ONE

1.0      INTRODUCTION

1.1      AIM OF THE PROJECT

1.2      OBJECTIVE OF THE PROJECT

1.3     APPLICATION OF THE PROJECT

1.4      PURPOSE OF THE PROJECT

1.5      SIGNIFICANCE OF THE PROJECT

1.6      LIMITATION OF THE PROJECT

CHAPTER TWO

2.0     LITERATURE REVIEW

2.1      HISTORICAL BACKGROUND OF AN AMPLIFIER

2.2     REVIEW OF CLASSIFICATION OF POWER AMPLIFIERS

2.3      OVERVIEW OF DOT/BAR DISPLAY

CHAPTER THREE

3.0     CONSTRUCTION METHODOLOGY

3.1      BLOCK DIAGRAM

3.2      CIRCUIT DIAGRAM

3.3      CIRCUIT OPERATION

3.4     CIRCUIT DESCRIPTION

3.5     POWER SUPPLY CIRCUIT

3.6      PARTS LIST OF THE CIRCUIT

3.7      DESCRIPTION OF COMPONENTS USED

CHAPTER FOUR

RESULT ANALYSIS

4.0      CONSTRUCTION PROCEDURE AND TESTING

4.1      CASING AND PACKAGING

4.2      ASSEMBLING OF SECTIONS

4.3      TESTING OF SYSTEM OPERATION

4.4      COST ANALYSIS

CHAPTER FIVE

5.1      CONCLUSION

5.2      RECOMMENDATION

5.3      REFERENCES