HC-89 Interrupt Sensor 10-Pin Alligator Clip to Male Jumper Wire for Test Lead (20 cm) select "Arduino Nano" in the

HC 89 Interrupt Sensor 10 Pin Alligator Clip to Male Jumper Wire for Test Lead (20 cm) select "Arduino Nano" in the select "Arduino Nano" in the Arduino IDE and emergency lighting setups 3V 5V DC Output Type Digital (High Low) with onboard comparator Onboard Comparator IC LM393 (or equivalent) Slot Width ~5mm (gap for object interruption) Detection Object Opaque objects passing through the slot Response Time Fast (microsecond level switching) Output Indicator Onboard LED for visual status feedback Sensitivity Adjustment Onboard potentiometer for threshold tuning Interface Pins VCC and troubleshooting included free with every purchase