This circuit is from a Radio Electronics from February 1966. The circuit is of a type that was found in many applications at the time as output from radios, televisions and other equipment.
This circuit for incandescent lamps was found in a 70s documentation. The circuit uses an SCR...
This circuit is from an Elementary Electronics from 1977. It can be assembled with relative ease...
This circuit detects the presence of strong signals from spy transmitters, enabling their...