8 Watt Audio Amp


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
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

Notes

  1. IC1 MUST be installed on a heat sink.
  2. C3 is for filtering and to prevent oscillation and should not be omitted.
  3. 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.
  4. The circuit draws about 880 ma at 12 V.
  5. By swapping the values of R1 and R3, you can turn this amplifier into a guitar amp with no preamp required.
  6. If you can’t find 2000uF, then replace C4 with a 2200uF unit.
  7. 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.
  8. Thanks to James Maloway for redrawing the schematic. The mew image is much easier to read then the old one.

Sorry, comments are closed!