This timer circuit was found in a 1980s American documentation. Transistors and SCR support modern equivalents. The circuit was originally designed to control a motor.
This dimmer for incandescent lamps was obtained from an American 1990s documentation. The circuit...
This circuit can be used in physics experiments, in ionization and in several other applications. The...
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...