Found in American documentation from the 1990s, this circuit has active cycle control. The basic components are given along with the diagram. Transistors are general purpose.
November 2016 - Mouser Electronics is makingToshiba's new TLP78x and TLP79x isolation amplifiers...
This relay triggered by voice or by another sound was found in an Elektor from the 90's. The...
This interesting manual circuit uses an SCR to switch a load on and off via pulses. The circuit was...