The RCWL-0516 Is A Doppler Radar Microwave Motion Sensor Module Using The RCWL-9196 IC Which Is An Alternative To A Pir Motion Sensor Such As The HC-SR501 Or HY-SRF05. Instead Of Sensing Changes In Infrared Emitted By A Moving Person, This Sensor Uses A Microwave Doppler Radar To Detect Moving Objects.
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