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 LM380-based circuit was found in documentation from the 1980s. The components are current, and...
This circuit makes use of an integrated LM2907. The circuit is from an old documentation being...
In the figure we have an amplifier using the 741 operational amplifier without the need for a...