Found in a 1968 EEE, this circuit uses transistors from that time. The output is 300 ns. Transistors can be replaced with modern equivalents.
Found in old American documentation, this circuit is intended for the control of heating elements. The...
This “people detector” with pyroelectric sensor was found in the April 1991 issue of Radio...
This circuit is from an old American publication, therefore using transistors that can no longer be...