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 used to match a high impedance input source with a low impedance output device...
When the AC Power line fails, the transistors in this circuit are biased to conduce the current to...
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...