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.
We found this circuit in a technical documentation from the 70s. It can be implemented with more...
We found this shield circuit in a 1991 technical documentation. The phototransistor can be...
This circuit was obtained from a Radio Electronics from October 1963. The 4 transistors must be...