The sensor on this module is a pyroelectric infrared sensor, which detects a movement in the detection area of the Fresnel lens and then outputs a "HIGH" signal at the sensor output pin "SIG" for 3 seconds. Then the signal returns to the "LOW" state. The soldered potentiometer is used for infinitely variable range adjustment. With the help of this module and a microcontroller such as Raspberry Pi or Arduino, it can be used for security systems or automation, among other things. https://elecena.pl/product/28015681/joy-it-sbc-pir-motion-detector 2025-03-12 https://elecena.pl/product/28015681/joy-it-sbc-pir-motion-detector 2025-09-17