We found this circuit in the October 1996 Electronics Now magazine. The circuit uses LDRs as sensors and drives relays. The relays must have voltages according to the power supply.
Found in a Popular Electronics from the 90s, this circuit triggers an indicator when these lights...
This common circuit using a multivibrator causes two lamps to alternately flash at a frequency and active...
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...