Hw-416-b Pir Sensor Datasheet Jun 2026

Unlike active sensors that emit a signal (like ultrasound or radar), the HW-416-B is passive. It only listens for changes in the ambient infrared spectrum. The module integrates a pyroelectric sensor element, a specialized control chip (frequently the BISS0001 or a similar ASIC), a Fresnel lens to focus incoming light, and supportive passive components on a single printed circuit board (PCB). 2. Technical Specifications (Datasheet Summary)

If the sensor detects motion while the output is already HIGH , it resets the internal timer. The output will remain HIGH continuously until the target stops moving and the delay time elapses. This is the preferred mode for automated room lighting. 4. How the HW-416-B Works Internal Mechanics

The sensor output goes low once the delay time expires, even if motion continues. Repeatable Trigger (H):

The HW-416-B features two potentiometers (yellow knobs) and one jumper for customizing behavior. 4.1 Sensitivity Adjustment (Potentiometer) hw-416-b pir sensor datasheet

Looking directly at the back of the PCB board (with the pins facing downward), the layout is typically configured as follows:

Flipping the board over reveals two orange potentiometers and a 3-pin jumper pad. These allow you to fine-tune the hardware behavior without changing code:

Passive Infrared Sensor - an overview | ScienceDirect Topics Unlike active sensors that emit a signal (like

Interfacing the HW-416-B with an Arduino Uno requires no external resistors or pulling components, as the sensor provides a clean digital output. Wiring Connections →right arrow Arduino 5V HW-416-B OUT →right arrow Arduino Digital Pin 2 HW-416-B GND →right arrow Arduino GND (Optional) LED Anode (+) →right arrow

On a rainy afternoon, she opened a new datasheet revision and noticed a minor update: a clarified recommended operating range and a tweak to the typical output waveform diagram. Small changes, but they mattered. She marked them in red and taped the page beside her original, a patchwork of knowledge that had guided a dozen small inventions.

Activating lights, screens, or animatronics when a visitor walks near an exhibition gallery. This is the preferred mode for automated room lighting

The is a reliable, low-power motion detection module ideal for microcontroller projects requiring a fast response and compact footprint. While an official unified datasheet remains elusive, the specifications and behavior described in this article are based on reverse-engineered measurements and manufacturer-compliant components.

Mira clipped the sensor into a prototype of a bedside lamp that would only light when someone entered the room after midnight. She soldered the Vcc and GND joints, ran a single wire from OUT to her microcontroller pin, and adjusted the sensitivity until the lamp ignored her sleeping cat but leapt to life when she walked by. Each test produced a tiny pulse on her logic analyzer: crisp, clean edges like a heartbeat. The datasheet’s timing diagram matched the pulses—an initial high for a few hundred milliseconds, then a retriggerable hold time as long as motion continued.

For exact timing schematics and gerber files, visit the open-hardware repository linked on this page. Bookmark this guide as your go-to reference for the .

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void setup() pinMode(2, INPUT); Serial.begin(9600); void loop() if (digitalRead(2) == HIGH) Serial.println("Motion Detected!"); delay(100); Use code with caution. Copied to clipboard