This circuit was obtained from documentation from 1968. The transistors used as well as the tunnel diodes are of the time.
This circuit for 12 V relays was found in the July 1992 Radio Electronics magazine. The circuit is set...
This circuit can produce signals up to 100 kHz depending on C1 and R1 adjustment. The output has a...
This circuit was suggested by Siliconix in a 1980s publication. The circuit uses components from the time...