This circuit was found in a Popular Electronics from the 90s. It is based on components still common today and an optical coupler for the triac. The sensor is a thermistor.
The circuit presented was found in the ON Semiconductor manual. In it we have a way to protect the...
This circuit is from Motorola's Linear Interface ICs from 1993. The MC1723 is the equivalent of...
In the figure we have a three-phase AC motor control for voltages up to 600 V or 1200 V depending on...