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.
|C1||1||10uf Electrolytic Capacitor|
|C2||1||470uf Electrolytic Capacitor|
|C3||1||0.1uF Disc Capacitor|
|C4||1||2000uf Electrolytic Capacitor||2200uF|
|R1||1||2.2 Ohm Resistor||Anything Within 10%|
|R2||1||220 Ohm Resistor||Anything Within 10%|
|IC1||1||LM383 8 Watt Amp IC||ECG1232, TDA2002|
- 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
- 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
- Thanks to James Maloway for redrawing the schematic. The mew image is much easier to read then the old one.