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.
This simple AM transmitter for very small ranges uses in the original version of the 1970s, a...
The HA2620 integrated circuit used in this comparator is from the 80's, but the setting can be...
Figure 1 shows a circuit than can be used as time stage in timers, and other applications....