This very low power amplifier is designed by Amperex for hearing aids. It is based on TAA370 which is not an integrated circuit that can be found today.
This circuit was obtained from a 1994 publication. Its purpose is to digitally switch 5 audio...
This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent...
This circuit for a decorative robot was found in the April 1988 Radio Electronics magazine. The...