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.
This circuit was found in a 90s Popular Electronics. The circuit uses components from that time,...
This circuit simulates a diode whose characteristics can be adjusted with a trimpot. The circuit is...
This circuit is a modification of the previous one, also found in the July 1995 Electronics Now...