Audio005

                                          

22 Watt Audio Amplifier
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Schematic design of 22W audio amplifier
Part Components of 22W Audio Amplifier:
Capacitors	Resistors
C1,C2 =     10 μF / 25V Electrolytic C3      =   100 μF / 25V Electrolytic C4      =     47 μF / 25V Electrolytic C5      =    0.1 μF / 25V Ceramic C6      = 2200 μF / 25V Electrolytic Semiconductors U1      = TDA1554	R1         =   39KΩ ¼W   Others MISC 1 Heatsink For U1 Binding Posts (For Output) RCA Jacks (For Input) Wire Board
Notes
The 22 watt amp is easy to build, and very inexpensive. The circuit can be used as a booster in a car audio system, an amp for satellite speakers in a surround sound or home theater system, or as an amp for computer speakers. The circuit is quite compact and uses only about 60 watts. The circuit is not mine, it came from Popular Electronics. The circuit works best with 4Ω speakers, but 8Ω units will do. The circuit dissipates roughly 28 watts of heat, so a good heatsink is necessary. The chip should run cool enough to touch with the proper heatsink installed. The circuit operates at 12 Volts at about 5 Amps at full volume. Lower volumes use less current, and therefore produce less heat. Printed circuit board is preferred, but universal solder or perf board will do. Keep lead length short.

Source : Electronics Lab