This circuit was obtained from Electronics Now magazine, July 1995. The triac depends on the heating element current, and the sensor will determine the adjustment potentiometer.
Found in a Hands On Electronics from the 80's, this circuit activates a relay with alternating...
This 1 A circuit was found in a Philips documentation from 1966. The transistor is of the time,...
We found this circuit in the Motorola Linear Databook of 1993. It is the traditional configuration with...