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.
We find this circuit in a 1978 documentation. The circuit uses two inverters of a 4049 integrated...
This circuit shows how to implement a TTL compatible oscillator using a transistor. The circuit is...
We found this circuit in an American 1980s documentation. The circuit can be assembled with modern...