AC Zero Crossing Detect

AC Mains Detection + Zero Crossing Detection

• 

  zero crossing

• http://bbs.elecfans.com/jishu_1936706_1_1.html
• https://www.hackster.io/hesam-moshiri/how-to-build-an-isolated-digital-ac-dimmer-using-arduino-b25aa1

Common Solutions

Bidirectional Detector

• H11AA1
• LTV8241 - WV

Single Direction + Diode Bridge

• DB107 + EL817