Isolated zero crossing detection with logic level output

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Wide voltage range 85-265V 50/60Hz Low current consumption (~0.15mA @ 120V) Pulse width 50-110us Opto isolators tested 4N25, PC817, ACPL-217 (and H11L1 with modifications) 3.3V or 5V output


Zero crossing detector


ID Name Designator Footprint Quantity
1 MMBT2222 Q3,Q2 SOT-23(SOT-23-3) 2
2 MB6S D1 MBS-4.9X4.0 1
3 TLP291 U2 SOP-4_P1.27 1
4 4.7nF C6 0805 1
5 470nF C7 0805 1
6 1N5711WS-7-F D10 SOD-323_L1.8-W1.3-LS2.5-RD 1
7 220K R9,R8,R11,R10 0805 4
8 75K R12 0805 1
9 10K R18,R16 0805 2


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