We found this circuit in the October 1987 Radio Electronics magazine. The triac must be controlled according to the heater. The transformer has a low current, of the order of a few hundred mA.
This circuit was found in a Radio Electronics Constructor, English magazine from April 1976; The...
This circuit was found in General Electric documentation from 1966. The circuit is suitable for any...
This 48 V circuit with a capacity of up to 105 V was found in a 2005 Linear Technology manual. The...