This circuit is from a 1968 Electronics World. It acts directly on a high voltage alternating current relay. The sensor can be a common LDR.
This circuit obtains phase-inverted signals from a single signal. The circuit uses two LM741...
This circuit shuts down a three-phase motor in the event of missing one or two phases, thus...
This circuit is from a 1968 Electronics World. It acts directly on a high voltage alternating...