Electronic Circuit: Audio Amplifier Module Kit
The ck700 is a very good audio amplifier with variable gain. The kit uses the LM386 IC from National Semiconductor. The unit is normally battery powered, though some modifications would enable it to be powered by DC power supply i.e. if such a regulated, smoothed power supply is connected instead of the battery.
The required DC input is anything from 4-12 Volts (VDC). The audio output is capable of powering a small speaker so that it can be used for low power, personal use.
Electronic Circuit: Audio Amplifier Module Kit Reviews: