Design and construction of 45w audio power amplifier

• 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