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 small auxiliary amplifier was found in a Radio Electronics from May 1958. Power is supplied with...
This traditional triplier configuration with the 555 can be found in other articles on the...
Indicated for activation by microcontrollers, this circuit was found in the Radio Electronics...