This circuit was found in an old American documentation. Its purpose is a proportional scanning signal for the oscilloscope of the time, which used cathode ray tubes.
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...