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TITLE PAGE
DESIGN AND CONSTRUCTION OF A THREE LEVEL AUDIO POWER INDICATOR
BY
---
--/H2013/01430
DEPARTMENT OF ----
SCHOOL OF ---
INSTITUTE OF ---
DECEMBER,2018
APPROVAL PAGE
This is to certify that the research work, "design and construction of a three level audio power indicator" by ---, Reg. No. --/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on --- has been approved.
By
--- . ---
Supervisor Head of Department.
Signature………………. Signature……………….
……………………………….
---
External Invigilator
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.
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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An audio amplifying device such as a power amplifier cannot deliver an output wave wider than its power supply voltage. When you reach the limit, increasing gain may sound louder but sound will be distorted and can even damage speakers. This audio power level indicator circuit will announce with an LED that you have reached a particular level of an audio power.
However, the main aim of this work is to display to display three different level of an audio device via LEDs
TABLE OF CONTENTS
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
TABLE OF CONTENT
CHAPTER ONE
- INTRODUCTION
- BACKGROUND OF THE PROJECT
- PROBLEM STATEMENT
- AIM OF THE PROJECT
- PURPOSE OF THE PROJECT
- OBJECTIVE OF THE PROJECT
- SIGNIFICANCE OF THE PROJECT
- APPLICATION OF THE PROJECT
- LIMITATION OF THE PROJECT
- METHODOLOGY
- PROJECT ORGANISATION
CHAPTER TWO
LITERATURE REVIEW
2.0 LITERATURE REVIEW
2.1 POWER HANDLING
2.2 POWER AND LOUDNESS IN THE REAL WORLD
2.4 POWER HANDLING IN 'ACTIVE' SPEAKERS
CHAPTER THREE
3.0 METHODOLOGY
3.1 BLOCK DIAGRAM OF THE SYSTEM
3.2 CIRCUIT DIAGRAM
3.3 CIRCUIT DESCRIPTION
3.4 SYSTEM OPERATION
3.5 DESIGN NOTES
3.6 DESCRIPTION OF MAJOR COMPONENTS USED
CHAPTER FOUR
RESULT ANALYSIS
4.1 CONSTRUCTION PROCEDURE AND TESTING
4.2 CASING AND PACKAGING
4.3 ASSEMBLING OF SECTIONS
4.4 TESTING OF SYSTEM OPERATION
CHAPTER FIVE
- CONCLUSIONS
5.3 REFERENCES
CHAPTER ONE
1.0 INTRODUCTION
1.1 BACKGROUND OF THE STUDY
Audio power is the electrical power transferred from an audio amplifier to a loudspeaker, measured in watts. The electrical power delivered to the loudspeaker, together with its efficiency, determines the sound power generated.
Amplifiers are limited in the electrical energy they can output, while loudspeakers are limited in the electrical energy they can convert to sound energy without being damaged or distorting the audio signal. These limits, or power ratings, are important to consumers finding compatible products and comparing competitors.
For the course of this work which is on three level audio power indicator. The circuit has been designed for loudspeakers to provide a monitoring scheme of audio power being supplied which will determine that any setup will not be required without the presence of a power supply.
The illumination of three LEDs will serves as the means of indicating the instantaneous power output being delivered to a loudspeaker. The circuit may be connected to any loudspeaker output of an audio amplifier. The illumination of the LEDs takes place one after another due to the little by little increase in the values of the voltage. This will provide a visual notion of luminous bars that forms a column while showing the increase and decrease in height in accordance to the output level of the signal.
1.2 PROBLEM STATEMENT
No one can determine the power generated from an audio amplifier through their physical examination. This device was built to solve this problem in that it indicates the level of audio power via LED indicator.
1.3 AIM OF THE PROJECT
The aim of this work is to design a device that is attached to an audio device which monitors the level of the output power.
1.4 PURPOSE OF THE PROJECT
The purpose of this work is to display the audio level of an audio device via LEDs
1.5 OBJECTIVE OF THE PROJECT
At the end of this work, student involved will be able to design this device which display three different audio power level using green, blue and orange colour LEDs
1.6 SIGNIFICANCE OF THE PROJECT
This device is used to monitor a loudspeaker, alarm, or audio source for presence of an audio waveform. It can also be directly connected across loudspeaker terminals used as a peak indicator.
1.7 LIMITATION/PROBLEM OF THE PROJECT
The circuit has one drawback in that it requires a separate power supply. This is compensated, however, by the fact that it is pretty sensitive (0.2W min.) and does not degrade the sound quality in any way, since it does not present an additional load to the amplifier.
1.8 APPLICATIONOF THE PROJECT
This device is used in audio devices such as:
- Audio and power amplifier
- Radio receiver
- DJ studios,
- cassette player ,
- tape recorders
- multimedia active speakers, etc.
1.9 METHODOLOGY
To achieve the aim and objectives of this work, the following are the steps involved:
- Study of the previous work on the project so as to improve it efficiency.
- Draw a block diagram.
- Test for continuity of components and devices,
- Design was carried out.
- Studying of various component used in circuit.
- Construct the circuit.
- Finally, the whole device was cased and final test was carried out.
1.10 PROJECT ORGANISATION
The work is organized as follows: chapter one discuses the introductory part of the work, chapter two presents the literature review of the study, chapter three describes the methods applied, chapter four discusses the results of the work, chapter five summarizes the research outcomes and the recommendations.CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "design and construction of a three level audio power indicator" is also available. Order full work to download. Chapter two of "design and construction of a three level audio power indicator" consists of the literature review. In this chapter all the related work on "design and construction of a three level audio power indicator" was reviewed.
CHAPTER THREE: The complete chapter three of "design and construction of a three level audio power indicator" is available. Order full work to download. Chapter three of "design and construction of a three level audio power indicator" 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 three level audio power indicator" is available. Order full work to download. Chapter four of "design and construction of a three level audio power indicator" 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 "design and construction of a three level audio power indicator" is available. Order full work to download. Chapter five of "design and construction of a three level audio power indicator" consist of conclusion, recommendation and references.
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