We found this circuit in the April 1982 Radio Electronics magazine. It contains a good power stage whose transistor must be mounted on a good heat sink.
This circuit allows 220 / 240V shavers to be used in the 110V network. The diodes can be general...
Used with telephones at the time, this circuit was found in Popular Electronics from the 90s. The...
This circuit was obtained from an American 80's documentation. It can be implemented with modern...