We found this circuit in an old RCA publication. The components are of the time, admitting equivalents. The circuit is triggered in two ways using LDRs.
This circuit is from a Radio Electronics magazine from May 1989. The source must be symmetrical, and other...
This circuit has a very fast switching action from an input signal. It can be applied to almost any...
This relay shield was found in the October 1993 Electronics Now magazine. The circuit is powered by...