Design And Construction Of A Stereo Level Indicator
A stereo level indicator refers to a device used to gauge and display the amplitude levels of audio signals in a stereo system. It typically comprises LED arrays or meters that visually represent the intensity of sound signals from left and right channels. The design and construction of such an indicator involve integrating components like operational amplifiers, rectifiers, and voltage comparators to process and measure audio signals accurately. This entails circuitry design, PCB layout, and housing assembly, ensuring precise signal detection and representation across frequency ranges while accounting for factors like signal-to-noise ratio and dynamic range. Implementing appropriate signal conditioning and filtering techniques is critical to achieve accurate level indication without distortion or signal degradation, ensuring optimal performance in stereo audio setups.
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
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