The Champ 0.5 Watt Audio Amplifier Kit

Refer: Silicon Chip February1994 This tiny module uses the LM386 audio IC, and will deliver 0.5W into 8 ohms from a 9 volt supply making it ideal for all those basic audio projects. It features variable gain, will happily run from 4-12VDC and is smaller than a 9 volt battery, allowing it to fit into the tightest of spaces. PCB and all electronic components included.