| Pin | Name | Description | |-----|--------|------------------------------------| | 1 | VCC | 4.5V – 20V DC power input | | 2 | GND | Ground | | 3 | OUT | Digital output (HIGH = motion) |
Some variants include a fourth pin (low-power mode or temperature compensation), but the HW-416-B is almost always 3-pin. hw-416-b pir sensor datasheet
If you’re building a motion-activated light, security alarm, or smart occupancy sensor, you’ve likely come across the HW-416-B PIR sensor module. At first glance, it looks identical to the famous HC-SR501. In fact, for practical purposes, the HW-416-B shares the same core components: a Pyroelectric Infrared (PIR) sensor, a BIS0001 (or similar) signal processing IC, and an adjustable lens. Many sellers list HW-416-B as equivalent to HC-SR501,
In this guide, we’ll cover everything you would find in a standard datasheet, plus tips for using it with Arduino, ESP32, or Raspberry Pi. but there are subtle differences:
Many sellers list HW-416-B as equivalent to HC-SR501, but there are subtle differences:
Conclusion: You can safely use an HC-SR501 datasheet as a reference for the HW-416-B, but the specifications provided in this article are more accurate for the "B" revision.
