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.
Found in an English Maplin documentation from 1983, this circuit generates separate frequency...
This high input impedance circuit uses a symmetrical source. Found in the October 1993 issue of...
Currents up to 1.5 A can be regulated with this circuit. The resistor R that determines the...