This circuit has a normally low output that is triggered by a high pulse. The circuit is from Radio Electronics from November 1984. The frequency is given by C1.
This is an interesting solution for intelligent load control using a cable and a diode array to...
This circuit shows how to use a Vishay IL4216 or IL12-F optodiac to control a triac in a common...
Found in documentation from the 1990s, this circuit supports equivalent transistors. The range is on...