DIYmall 5 Pack HC-SR501 PIR Motion IR Sensor Body Module Infrared For Arduino
$11.99
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5 Way Tracking Sensor TCRT5000L - Infrared Reflection Module Photoelectric fo...
$11.44
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About this item
Detection Probe: Photoelectric TCRT5000L. Operate the sensor by connecting it to 3.3V-5V power sources. When detecting white lines, the digital output switches to high level with LED illumination; over black lines, it outputs low level with LED off.
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