Found in a 1968 US publication, this circuit produces a delayed pulse with the negative transition of the input signal. The circuit can be used as a shield.
We found this circuit in an old Popular Electronics. The circuit is experimental, driving an LED...
This useful circuit is used to test the insulation of cables, appliances, leaks in high voltage...
This circuit is from the magazine 73, for radio amateurs, from the 80s. The circuit uses common...