Found in an Electronic Design from the 90s, this circuit measures the phase difference between two signals using an electronic multimeter. The circuit makes use of components of the time.
This 1989 circuit activates a protection relay if one or two phases are missing from a three-phase...
This simple TTL electronic dice uses common anode displays. The circuit is from a March 1975 Radio...
This non-pulse alarm can be used as an event detector or even an alarm. The circuit can also be...