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3Pcs 1Channel AC 220V Optocoupler Module 220V Voltage Detect 220V Optocoupler Isolation Microcontroller TTL Level 3V 5V June_2023_update HDMI and DVI with HDCP Size:1 m HDMI and DVI with HDCP and VGA inputs Read more Package includes: 6PCS 400 Tie Points Breadboard Read more When detecting 220V input and the optocoupler is conducting and outputting a low level
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