Aukru HC-SR501 Human Body Pyroelectricity Infrared PIR Motion Detector Sensor Module for Arduino, Raspberry Pi and Microcontrollers Electronic Projects HC--SR501 Body Sensor Module The human body sensor lighting industrial automation and control, etc.Ideal for Arduino, Raspberry Pi, PIC and more. The automatic sensor: to enter the sensor output range is high, people leave the sensor range of the automatic delay off high, output low. Operating voltage range: DC 4.5-20V Board Dimensions: 32mm*24mm