The HW416B allows for adjustable delay time, which can be set using a potentiometer on the module. The delay time can be adjusted from 2-4 seconds.
// Turn off LED after hold time (simulates retrigger management) if (millis() - lastMotionTime > MOTION_HOLD_MS) digitalWrite(LED_PIN, LOW); hw416b pir sensor datasheet better
After the output turns LOW, the sensor goes blind for ~2.5 seconds. This is a hardware limitation of the BISS0001 chip. You cannot fix this with code. The HW416B allows for adjustable delay time, which
The output signal of the HW416B is a digital signal that goes high (1) when a person is detected and low (0) when no person is detected. The output signal can be connected directly to a microcontroller or other digital circuit. This is a hardware limitation of the BISS0001 chip
PIR sensors are sensitive to power supply noise. Adding a 10uF electrolytic capacitor across the VCC and GND pins can significantly reduce "phantom" triggers caused by voltage ripples.
Most "datasheets" show a blurry image. Here is the clear pinout:
Once motion is detected and the output goes High, it will stay High for the set duration and then go Low, even if there is still motion. Repeatable Trigger (H):