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 American documentation from the 1980s, this circuit shows how to use an LM3909 pulsator in a...
Found in American documentation from 1969, this circuit produces a pulsating waveform being...
This circuit is from an April 2000 Poptronics. The magazine no longer exists, but the circuit can...