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RCWL-0516 Microwave Radar Sensor Features The RCWL-0516 microwave radar motion detection sensor is used to detect motion at a maximum distance of 9 meters. The viewing angle of this module is about 270 degrees and it has a digital output. You can install a photocell sensor on this module. Note The RCWL-0516 module does not work properly at a distance less than 20 cm. Note This module can measure a maximum distance of 7 meters by default; but you can adjust distance by placing a resistor behind the board. No...