10 PCS HC-SR501 PIR Module Pyroelectric Infrared Motion Sensor Module Detecto...
$27.40
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10 PCS HC-SR501 PIR Module Pyroelectric Infrared Motion Sensor Module Detecto...
$27.40
View this item on eBay
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About this item
HC-SR501 Motion sensor detector, when people approach to the sensor, its output is high, when people leave the sensor, its output is low.
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