This circuit was obtained from Radio Electronics magazine, October 1987. The circuit uses a triac to control the heating element current. The transistors are general purpose.
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...