This circuit was obtained in old documentation, but it is valid for modern triacs that must be equipped with heat sink. The trigger element is an ordinary neon lamp.
This thermal control circuit appeared in Radio Electronics magazine in October 1958. The circuit is...
This small medium wave radio was manufactured in the 1960s in Japan. The circuit is powered by 4...
This circuit is from a 1988 publication. It makes use of an LM3914 LED driver circuit, still...