Mini Audio Amplifier with LM380

This is the very simple circuit of mini audio amplifier single channel / mono using low cost IC LM380. For stereo application, just build the identical circuit.

The circuit shown in Figure 1 is a very simple audio power amplifier. The main component of this circuit is the LM380 audio amplifier. The simplicity of this circuit is made possible by the LM380's minimal requirements for external components, since it is already internally equipped with the necessary biasing, compensation, and gain circuits for audio amplification.

250 milliwatts Amplifier with TDA2822

This is 250 milliwatts amplifier scheme design with TDA2822. This low power amplifier generates 250 mW on each channel, can be used for general purposed application such as walkman, mp3 player, radio etc. This may well configured to operate in stereo or bridge, which is obtained more power in mono channel.

Echo Chamber Schematic Diagram

This is the schematic diagram of echo chamber circuit which will convert the input sound to have echo sound just like if you talking in the cave. This echo chamber circuit can be applied on any source of audio signal like microphone, mp3 player, radio, etc. The aims is smoothing the voices with echo.