Hw416b Pir Sensor Datasheet Better Jun 2026

Here are three improved post title options and a short body you can use.

You have a small, blue breakout board labeled . It has a PIR sensor, a lens, a jumper, and two potentiometers. You need the pinout, voltage range, and timing specs. So you search… and find nothing but shady forums, broken links, or generic PIR information. hw416b pir sensor datasheet better

(usually labeled TIME)

The HW-416B requires a stabilization period (usually 10–60 seconds) after powering up. During this time, the sensor "learns" the ambient infrared signature of the room. Ensure your code ignores signals during this initialization phase. Here are three improved post title options and

The HW-416B has (trimpots).

| Symptom | Likely Cause | Better Fix | | :--- | :--- | :--- | | | 1. Continuous false trigger 2. Time delay set too long | Reduce sensitivity (turn SENS pot CCW). Remove nearby heat sources (WiFi routers, direct sunlight). | | Output always LOW | 1. No power 2. Stabilization period active 3. Dead sensor | Wait 30-60 seconds after power-up – the sensor calibrates. Measure voltage between VCC and GND. | | Detects but stays on forever | Jumper in repeatable mode + continuous motion | This is normal. Alternatively, switch jumper to Single mode (H) to force a fixed OFF time. | | Detects motion from outside (pets/cars) | Sensitivity too high OR lens pointing through glass | Turn sensitivity down to 30%. Mask parts of the Fresnel lens with tape (black electrical tape works best). | | Random triggering when AC turns on | Power supply noise | Add 100µF & 0.1µF capacitors across VCC/GND. Use a dedicated 5V regulator (not the Arduino 5V pin). | You need the pinout, voltage range, and timing specs