2 Watt Mini Audio Amplifier circuit design

2 Watt Mini Audio Amplifier circuit design

Components list:
P1 = 10K Log.Potentiometer
R1,R2 = 33K 1/4W Resistors
R3 = 33R 1/4W Resistor
R4 = 15K 1/4W Resistor
R5,R6 = 1K 1/4W Resistors
R7 = 680R 1/4W Resistor
R8 = 120R 1/2W Resistor
R9 = 100R 1/2W Trimmer Cermet

C1,C2 = 10?F 63V Electrolytic Capacitors
C3 = 100?F 25V Electrolytic Capacitor
C4,C7 = 470?F 25V Electrolytic Capacitors
C5 = 47pF 63V Ceramic Capacitor
C6 = 220nF 63V Polyester Capacitor
C8 = 1000?F 25V Electrolytic Capacitor

D1 = 1N4148 75V 150mA Diode

Q1 = BC560C 45V 100mA PNP Low noise High gain Transistor
Q2 = BC337 45V 800mA NPN Transistor
Q3 =TIP31A 60V 4A NPN Transistor
Q4 = TIP32A 60V 4A PNP Transistor

SW1 SPST switch

SPKR 3-5 Watt Loudspeaker, 8, 4 or 2 Ohm impedance

This schematic diagram come from circuit: 2 Watt Mini Audio Amplifier.
Go to that page to read the explanation about above circuit design.

In the electrical sector, a schematic diagram is usually used to describe the design or model of equipment. Schematic diagrams are usually utilized for the maintenance and repair of electronic and electromechanical devices / units. Original schematics were made by hand, using standardized templates or pre-printed adhesive symbols, but nowadays Electrical CAD computer software is often used.

In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More lately, using the progress of computer system technology, other representations were introduced and specialized computer languages were developed, because with the explosive development of the complexity of electronic circuits, classic schematics are getting less practical. As an example, hardware description languages are indispensable for contemporary digital circuit design.

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