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 voltmeter has an input resistance of 200 M ohms (47 M ohms resistors can be used in series to...
It is a simple blinker that simulates the action of an alarm when installed on the dashboard of a...
This circuit was found in General Electric documentation from the 1980s. The circuit uses couplers...