This basic Schmitt trigger was found in an American publication from 1968. The circuit uses transistors from the time. Modern general-purpose types can be used.
The circuit presented is from a 1972 RCA technical documentation. The integrated circuit consists of a...
This circuit is from a 1967 publication. The configuration holds true for modern transistors having...
This proximity relay circuit was found in the July 1990 Radio Electronics magazine. The supply...