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.
This circuit trips when the input signal goes through zero, triggering a direct current load. The...
This circuit is suitable for recovering vinyl media, having been found in an old sound magazine from...
CMOS integrated circuits are sensitive to supply voltages in terms of signal propagation time....