This circuit uses an optocoupler with a phototriac or optotriac to drive an external triac. The circuit is from a Radio Electronics magazine from December 1989.
This circuit is from an old Italian publication, using components that are no longer manufactured, but that...
This circuit was found in a 1967’s Ferranti documentation. The components are from that time. The...
This low-power benchtop circuit has an output for external use and other features. The circuit is from...