This medium power circuit is from an English publication from 1989. The integrated circuits are of types that are still obtainable. The power supply must source at least 2A.
.
This logic gate that increases the duration of input pulses was found in a NASA documentation from 1966....
This circuit was obtained from an American documentation from 1976. The circuit can be adapted to...
This circuit was found in Philips documentation from 1969. The components are from the time...