10PCS Speed Sensor Module Slot-type IR Optocoupler LM393 for Arduino Groove Coupler 3.3V-5V Relay Buzzer Module High Precision
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£9.41
10PCS Speed Sensor Module Slot-type IR Optocoupler LM393 for Arduino Groove Coupler 3.3V-5V Relay Buzzer Module High Precision
Prices updated 10 Apr 2026
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10PCS Speed Sensor Module Slot-type IR Optocoupler LM393 for Arduino Groove Coupler 3.3V-5V Relay Buzzer Module High Precision
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