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1PC LM393 Photodiode Light Sensor Module 1 CH Adjustable 3.3V-5V for #pb

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1PC LM393 Photodiode Light Sensor Module 1 CH Adjustable 3.3V-5V for *rr

2PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for /51/AVR/ *rr