This light effect circuit was found in the July 1971 Radio Electronics magazine. The circuit is powered by 110 V mains but can be modified depending on the triac and lamp.
This circuit, found in a 1986 documentation, uses an optical sensor to count pulses and, in its...
This circuit, found in a 1997 publication, activates a lamp or a monitoring camera when the bell...
We found this circuit in an English publication in 1981. It can be improved by exchanging T1 for a...