The is a passive infrared (PIR) motion sensor module commonly used in Arduino, Raspberry Pi, ESP32, and other microcontroller projects. It is functionally similar to the popular HC-SR501 but features a different PCB layout, lens, and sometimes a smaller form factor. The module detects infrared radiation emitted by moving humans or animals within its field of view.
+5V ──── VCC (HW-416-B) GND ──── GND OUT ──── 220Ω ──── LED ──── GND hw-416-b pir sensor datasheet