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HC-SR505 Mini PIR Motion Sensor [HC-SR505] - US $2.20 : HAOYU Electronics : Make Engineers Job Easier
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Amazon.com : Bundle of HC-SR501 + HC-SR505 PIR Infrared Sensor Human Body Infrared Motion Module : Electronics
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Amazon.com: Stemedu HC-SR505 Mini Infrared PIR Motion Sensor, Micro IR Pyroelectric Human Movement Detector Sensors Module (Pack of 5) : Electronics
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