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.
The four gates of a 40111 IC are used in thes two-out circuit. The output chages their state in a...
The sensor of this circuit is a 2N3055 transistor from which the housing cover has been removed to...
Found in the November 1984 issue of Radio Electronics magazine, this circuit is based on the CMOS...