Description HC-SR505 Mini PIR Motion Sensor HC-SR505 Mini Infrared PIR Motion Sensor Detector Module is based on infrared technology, It automatically controls the products with high sensitivity, high reliability, ultra-small size, and ultra-low-voltage operation mode. The device works based on infrared technology and it can automatically control by itself with high sensitivity and high reliability. Because of the minimum size and low-power operation mode, it is widely used in battery-powered applications. The sensor module is basically used in applications where you want to detect the motion of a body which emits infrared radiations. HC-SR505 is preferred to be used in battery operated systems since the device is specifically designed to be operated by consuming very less power. Because of its small size the module can be installed in applications where the system size is taken in to consideration. Pinout: