This two-output circuit was found in General Electric documentation from the 1990s. The circuit uses an NTC as a sensor and the control element is an SCR.
Found in a 1967 Electronics World, this circuit can use any modern equivalent FET. Observe the...
Found in American documentation from the 90's, this circuit applies to other operational...
This circuit was obtained from the February 1992 Radio Electronics magazine. In it, a bar of 4...