This medium power circuit is from an English publication from 1989. The integrated circuits are of types that are still obtainable. The power supply must source at least 2A.
.
Very strong audio spikes in a headset can damage the ear. This circuit, from a 90s Popular...
This circuit is suggested by National Semiconductor and can serve as a basis for an excellent...
This circuit allows 220 / 240V shavers to be used in the 110V network. The diodes can be general...