This circuit for incandescent lamps was found in a 70s documentation. The circuit uses an SCR according to the power of the controlled lamps. The delay is a few seconds, given by capacitor C1.
The control of the triac in this power flasher for incandescent lamps is made by a relaxation...
This series motor control circuit was obtained from an old manual from the 80's. The SCRs must be...
This circuit, from a 1978 publication, uses a germanium power PNP, but the BD135 can be used for 6...