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 reference voltage for this circuit can be selected digitally. The circuit is from Radio...
This basic circuit for a germanium transistor at the time was taken from a Mullard Manual from...
Found in the July 1993 Electronics Now magazine, this circuit provides an output voltage whose...