This circuit controls a heating element using a triac. Triac must be fitted with a heat sink. We find it in an American documentation from the 80s.
May 2017 - Texas Instruments' new OPAx388 operational amplifiers can now be purchased from Mouser...
Based on components from Linear Technology, we find this circuit in a 2005 manual. The circuit...
This circuit was found in an American documentation from 1969. Indications of the used transistors are...