Found in a 1965 Electronic Design, this circuit divides the frequency of a cascaded signal using unijunction transistors. The bipolar transistor supports an equivalent. The shock is 470 mH.
This circuit turns on and off when a short pulse is applied by SW to the input of the first...
This circuit was found in a 1970 US publication. Transistors are still common and the circuit can be...
This circuit locks after a short touch on the sensor. The circuit can be powered by voltages from 5...