This circuit was found in a 1969 US documentation. It provides a signal that can be externally programmed as suggested circuits. The circuit can be used as a shield.
This circuit can use any comparator or even an operational amplifier. We can use the LM339 and the...
This circuit is from an 80's American documentation. The circuit uses components of the time which...
The pulse duration is determined by the 100k resistor and the separation by the 1M resistor. The...