Found in American documentation from the 90s, this circuit can be applied to other operational ones. We found it in an EDN of the time. Next to the diagram is the response curve.
This digital pulse counter offers an LED indication. Its maximum frequency is of the order of 5...
This 1960s Signalite circuit uses two SCRs to achieve full wave control. The trigger elements are...
This circuit was obtained from a Popular Electronics. The component is a UJT. The circuit has an...