This circuit is from an old documentation from the 80's. The circuit provides an output signal for a warning or alarm system that indicates when a fuse or circuit breaker opens.
This circuit causes the relay to be energized when the input voltage exceeds the voltage value of...
The maximum frequency of this circuit is 500 kHz. We found it in a documentation for radio...
The mains cables work as antennas. We can take advantage of them with this circuit that consists of a...