YL-333 Magnetic Anti-theft Alarm for Door/ Windows 1/4 Inch Water Flow Sensor YF - S402 Hands-on experimentation for better retention
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Description
YL 333 Magnetic Anti theft Alarm for Door Windows 1 4 Inch Water Flow Sensor YF S402 Hands on experimentation for better retention Hands on experimentation for better retention Optocoupler Isolation: Relay driver circuit includes optocoupler isolation to protect the ESP8266 from relay switching noise and back EMF
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