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8 Watt Audio Amp

2016-01-08 11:22  
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Here is the schematic for an 8 watt audio amp. This amp can be used as a simple booster, the heart of a more complicated amplifier or used as a guitar amp.

 

Schematic

Schematic for amp

 

LM383 Pinout

Pinout for LM383 audio amp IC

 

Parts

Part
Total Qty.
Description
Substitutions
C1110uf Electrolytic Capacitor 
C21470uf Electrolytic Capacitor 
C310.1uF Disc Capacitor 
C412000uf Electrolytic Capacitor2200uF
R112.2 Ohm ResistorAnything Within 10%
R21220 Ohm ResistorAnything Within 10%
IC11LM383 8 Watt Amp ICECG1232, TDA2002
 

 

Notes

IC1 MUST be installed on a heat sink.C3 is for filtering and to prevent oscillation and should not be omitted.The circuit can be built on a perf board, universal solder board or PC board, the PC board is preferred. I built the circuit on a perf board and had to add a low value inductor at the input to prevent oscillation.The circuit draws about 880 ma at 12 V.By swapping the values of R1 and R3, you can turn this amplifier into a guitar amp with no preamp required.If you can't find 2000uF, then replace C4 with a 2200uF unit.If you add a 0.2uF capaciitor in series with a 1 ohm resistor to the output you can prevent oscillation of the circuit under certain conditions.Thanks to James Maloway for redrawing the schematic. The mew image is much easier to read then the old one.
 

 


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