This well-designed bistable circuit was found in a 1970s documentation. Transistors can be current types and germanium diodes. The voltage depends on the logic used and can be made with 5 V.
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This circuit was found in a 1964 documentation. It shows how to achieve automatic gain control for...
Using transistors at the time, this circuit was found in a 1967 Ferranti documentation. The...
This circuit, which controls both the temperature and the level of a liquid in a reservoir, was...