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The HW-416-B is a passive infrared (PIR) motion sensor module based on the HC-SR501 design. It detects changes in infrared radiation (body heat) within its field of view. It is widely used for human/animal motion detection in security systems, automatic lighting, and IoT projects.
The module typically features three pins, usually marked on the PCB or under the white Fresnel lens: Power input ( is recommended for most applications). OUT: Digital output signal ( 3.3V3.3 cap V GND: Ground connection. On-Board Adjustments hw-416-b pir sensor datasheet
When designing your next motion-sensing project, remember: The HW-416-B is a passive infrared (PIR) motion
On the corner of the module, you will find three solder pads or a jumper labeled and L . The module typically features three pins, usually marked
This article serves as a complete , covering every technical detail you need: electrical characteristics, pin configuration, sensitivity adjustment, time delay settings, wiring diagrams, and troubleshooting tips.