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 simple test circuit was found in the April 1983 issue of Radio Electronics magazine. The...
This circuit for 6 lamps was found in old American documentation. The supply is of high voltage...
This sensitive three-transistor circuit was found in Electronics Now magazine and is...