This circuit is from a 1968 documentation. It generates a non-symmetrical signal with the waveform shown next to the diagram. Transistors are of the time, but modern equivalents can be used.
This interesting circuit appeared in the April 1952 Radio Electronics magazine. The circuit is...
This 3-digit code switch was obtained from an old American documentation. The capacitor is 470 uF...
In the figure we have a circuit that simulates a unijunction transistor in an oscillator obtained from...