The time of this timer depends on C1. The circuit was found in the July 1994 Electronics Now magazine. The supply voltage depends on the relay and can go up to 12 V.
This circuit should only be used with incandescent lamps and the SCR should be fitted with a heat...
The circuit is from an old documentation making use of an operational amplifier of the time. The...
SIDACs are not very common, but if you get one you can mount a relaxation oscillator capable of...