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 LED indicator circuit uses an LM339 comparator. The circuit was found in the January 1995...
This version is one of many that can be found on our website. We found it in Radio Electronics from the...
Found in a 2005 Linear Technology application manual, this circuit provides outputs from a current...