Design and construction of 45w audio power amplifier | Blazingprojects Postgraduate Thesis
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Design and construction of 45w audio power amplifier

 

Table Of Contents


  • Figure
  • 1.1circuit diagram of a 25W Audio Power AmplifierFigure
  • 2.1Resistor colour band tableFigure 2.2a Colour code marking on a resistorFigure 2.2b Circuit symbol of resisitorFigure
  • 2.3Circuit symbols of capacitorFigure
  • 2.4Diode circuit symbolFigure 2.5a Formation of potential barrierFigure 2.5b Forward biasing a P-N junction diodeFigure 2.5c Reverse biasing a P-N junction diodeFigure 2.6a Structure and symbol of p-n-p and n-p-n transistorFigure 2.6b Biasing of a transistorFigure
  • 2.7  Structure of an IC Figure
  • 2.8JRC 4558IC circuit diagramFigure 3.1a The power supply circuit diagramFigure 3.1b Block diagram of a power supply unitFigure 3.2a The Pre-amplifier circuit diagramFigure 3.2b The OP-amp audio mixerFigure
  • 3.3The tone control circuitFigure 3.4a A complementary symmetry class B amplifierFigure 3.4b The output stage of the public address systemFigure
  • 4.1The circuit layout diagramFigure
  • 4.2The body construction diagram (case)Figure
  • 4.6Costing table.TABLE OF CONTENTSTitle pageDedicationAcknowledgementApproval pageAbstractList of tables, graph and figuresTable of contentsCHAPTER ONE1.1 IntroductionCHAPTER TWO: DESCRIPTION OF CIRCUIT ELEMENT2.1 Resistors2.2 Capacitors2.3 Diodes2.4 Bipolar Junction Transistor (BJT)
  • 2.5Integrated Circuits (ICs)

Chapter THREE

RESEARCH METHODOLOGY

  • PRINCIPLE OF OPERATION3.1 Power supply3.2 Pre-amplifier3.3 Tone control3.4 Power amplifierCHAPTER FOUR: CONSTRUCTION AND TESTING4.1 Breadboard/Prototyping4.2 Circuit layout4.3 Construction4.4 Testing and Result4.5 Packaging4.6 CostingCHAPTER FIVE: CONCLUSION/RECOMMENDATIONReferences

Thesis Abstract

This thesis gives the account for the design and construction of a 45W Audio Power Amplifier with the objective of producing a reliable and cheaper amplifier that can be used in a household or stage.

The Audio Power Amplifier was constructed with electrical/electronics components such as resistors, capacitors, transformer, transistors and so on. Many tools/instruments like soldering iron, multimeter and so on were used.

The 45W Audio Power Amplifier when compared with other types of Audio Power Amplifier of the same rating in the market is cheaper as the  components and materials used were locally sourced and selected to suit the desired purpose and environment.


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