This circuit interrupts the power supply when grounding is missing. The circuit is from an old documentation (from the 80's) using current transformers and other components of the time.
Found in a 1960s RCA manual, this circuit uses components from the era. For the indicated circuit R1 is...
Another dimmer circuit. This dimmer for incandescent lamps was found in the July 1970 issue of...
This shield or interface makes it possible to control power loads connected to the power grid from...