look at pin 21
No. Bertus is right. Look at the IC input. http://www.isocom.com/SFH620A-2/AC+Input.htm. It has a pair of back to back LEDs. Each conducts on alternate half cycles...think rectifier. The output transistor doesn't care about the polarity that makes each LED conduct. It will conduct as pulsating DC with twice the frequency of the input AC signal. The output will look exactly like full-wave rectification, which it essentially is.I think Im correct in saying that?
by Aaron Carman
by Duane Benson
by Duane Benson