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TITLE PAGE

DESIGN AND CONSTRUCTION OF A 555 TIMER PWM AUDIO AMPLIFIER

BY

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EE/H2013/01430
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING
SCHOOL OF ENGINEERING
INSTITUTE OF ---

DECEMBER,2018

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APPROVAL PAGE

This is to certify that the research work, "design and construction of a 555 timer pwm audio amplifier" by ---, Reg. No. EE/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on Electrical and Electronics Engineering has been approved.

By
Engr. ---                                                     Engr. ---
Supervisor                                                  Head of Department.
Signature……………….                           Signature……………….        

……………………………….
 Engr. ---
External Invigilator

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DEDICATION
This project is dedicated to Almighty God for his protection, kindness, strength over my life throughout the period and also to my --- for his financial support and moral care towards me.Also to my mentor --- for her academic advice she often gives to me. May Almighty God shield them from the peril of this world and bless their entire endeavour Amen.

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ACKNOWLEDGEMENT

The successful completion of this project work could not have been a reality without the encouragement of my --- and other people. My immensely appreciation goes to my humble and able supervisor mr. --- for his kindness in supervising this project.
My warmest gratitude goes to my parents for their moral, spiritual and financial support throughout my study in this institution.
My appreciation goes to some of my lecturers among whom are Mr. ---, and Dr. ---. I also recognize the support of some of the staff of --- among whom are: The General Manager, Deputy General manager, the internal Auditor Mr. --- and the ---. Finally, my appreciation goes to my elder sister ---, my lovely friends mercy ---, ---, --- and many others who were quite helpful.

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PROJECT DESCRIPTION: This work “design and construction of a 555 timer pwm audio amplifier” research material is a complete and well researched project material strictly for academic purposes, which has been approved by different Lecturers from different higher institutions. We made Preliminary pages, Abstract and Chapter one of “design and construction of a 555 timer pwm audio amplifier” visible for everyone, then the complete material on “design and construction of a 555 timer pwm audio amplifier” is to be ordered for. Happy viewing!!!

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Conventional methods of audio amplification use high power circuits to drive a loudspeaker for areas like an auditorium or any other hall. However for applications involving use of small loudspeakers for low range requirements, we can meet the requirements by constructing a low power amplifier with a low output current such as 200 mA. In this work, we are discussing the principle, design and operation of a low power audio amplifier using 555 Timer. The 555 Timer generates a carrier signal which is modulated by the amplified audio signal to produce a modulated signal. This signal is used to drive a small loudspeaker.
Here, the 555 IC works in astable mode. The switching frequency can be varied from 65 kHz to 188 kHz. Selection of PWM frequency depends on the amplitude of the input signal as well as the load impedance. By adjusting VR1, you can ensure comfortable listening with low audio distortion.

TABLE OF CONTENTS
COVER PAGE
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
CHAPTER ONE
1.0      INTRODUCTION
1.1      BACKGROUND OF THE PROJECT

1. PURPOSE OF THE PROJECT
2. AIM OF THE PROJECT
3. OBJECTIVE OF THE PROJECT
4. PURPOSE OF THE PROJECT
5. LIMITATION OF THE PROJECT
6. ADVANTAGES OF THE PROJECT
7. PROBLEM OF THE PROJECT
8. APPLICATION OF THE PROJECT
9. RESEARCH QUESTION
10. PROJECT ORGANISATION

CHAPTER TWO
LITERATURE REVIEW

1. OVERVIEW OF THE STUDY
2. REVIEW OF THE RELATED STUDY
3. OVERVIEW OF 555 TIMER IC

CHAPTER THREE
3.0     CONSTRUCTION METHODOLOGY
3.1      BASIC OF THE SYSTEM
3.2      BLOCK DIAGRAM OF THE SYSTEM
3.3      SYSTEM OPERATION
3.4      CIRCUIT DIAGRAM
3.5      CIRCUIT DESCRIPTION
3.6     DESCRIPTION OF COMPONENTS USED
3.7      POWER SUPPLY UNIT
CHAPTER FOUR
4.0      TESTING AND RESULTS

1. CONSTRUCTION PROCEDURE AND TESTING
2. INSTALLATION OF THE COMPLET DESIGN 
3. ASSEMBLING OF SECTIONS
4. TESTING OF SYSTEM OPERATION
5. COST ANALYSIS

CHAPTER FIVE

1. CONCLUSION
2. RECOMMENDATION

REFERENCES

CHAPTER ONE: The complete chapter one of “design and construction of a 555 timer pwm audio amplifier” is available. Order full work to download. Chapter one of “design and construction of a 555 timer pwm audio amplifier”consists of the literature review. In this chapter all the related work on“aa” was reviewed.

CHAPTER TWO: The complete chapter two of “design and construction of a 555 timer pwm audio amplifier” is available. Order full work to download. Chapter two of “design and construction of a 555 timer pwm audio amplifier” consists of the literature review. In this chapter all the related work on “design and construction of a 555 timer pwm audio amplifier” was reviewed.

CHAPTER THREE: The complete chapter three of “design and construction of a 555 timer pwm audio amplifier” is available. Order full work to download. Chapter three of “design and construction of a 555 timer pwm audio amplifier” consists of the methodology. In this chapter all the method used in carrying out this work was discussed.

CHAPTER FOUR: The complete chapter four of “design and construction of a 555 timer pwm audio amplifier” is available. Order full work to download. Chapter four of “design and construction of a 555 timer pwm audio amplifier” consists of all the test conducted during the work and the result gotten after the whole work

CHAPTER FIVE: The complete chapter five of “design and construction of a 555 timer pwm audio amplifier” is available. Order full work to download. Chapter five of “design and construction of a 555 timer pwm audio amplifier” consist of conclusion, recommendation and references.

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