opto isolator - Zero crossing detector output to another optocoupler - Electrical Engineering Stack Exchange
MOC3083 Zero Cross Triac OptoIsolator (2PCS)
Improved Zero-Crossing Pulse Detector for Arduino
What is the difference between zero-cross triac couplers and non-zero-cross triac couplers? How should they be used properly? | Toshiba Electronic Devices & Storage Corporation | Asia-English
analog - Struggling to understand zero cross detecting circuit - Electrical Engineering Stack Exchange