7W Mini Audio Amplifier Circuit based LM383

Posted on Feb 5, 2014

This is a very-very simple mini audio amplifier circuit. The circuit build based single LM383 with several discrete circuit to support LM383. The circuit capable to deliver about 7W audio output. The circuit could 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 t

7W Mini Audio Amplifier Circuit based LM383
Click here to download the full size of the above Circuit.

o add a low value inductor at the input to stop oscillation. In the event you add a 0. 2uF capaciitor in series with a 1 ohm resistor to the output you`ll be able to prevent oscillation of the circuit under specific conditions. An audio amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain. The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio amplifiers require these low-level inputs to adhere to line levels. While the input signal to an audio amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts. More explanation about power audio amplifier can be found at wikipedia. org This is the video tutorial about how to build a realy simple headphone amplifier. The circuit powered with 9V battery and use an IC to amplify the input signal from mp3 player.

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