Hw-416-b Pir Sensor Datasheet -

HW-416-B → Arduino VCC → 5V GND → GND OUT → Digital Pin 2

Avoid placing the sensor near heat sources, air conditioners, heaters, or direct sunlight. Moving air currents with distinct temperatures can trip the sensor.

5 seconds to 200 seconds (adjustable via potentiometer) Blockade Time: 2.5 seconds (default)

: PIR sensors are highly effective for energy-saving applications, ensuring lights or devices are only active when a room is occupied. hw-416-b pir sensor datasheet

The HW-416-B features a highly intuitive hardware layout, typically consisting of a 3-pin interface for connectivity, two potentiometers for manual tuning, and a jumper configuration for trigger selection. Pin Configuration

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.

| Problem | Likely Cause | Solution | |---------|--------------|----------| | No output | Warm-up period | Wait 60 seconds after power-on | | Always HIGH | SENS too high | Reduce SENS pot counter-clockwise | | Always LOW | Delay too short or SENS too low | Increase TIME or SENS pot | | False triggers | Vibration, RF noise, or heat sources | Mount securely; add 100nF cap across VCC/GND | | Short detection range | Lens dirty or SENS low | Clean lens; increase SENS | HW-416-B → Arduino VCC → 5V GND →

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Ground connection (Connect to the system common ground). Onboard Adjustments (Potentiometers)

Last updated: October 2025. Specifications are based on Revision 2.3 of the HW-416-B board. Always verify with your specific module version. The HW-416-B features a highly intuitive hardware layout,

1.0 Date: Based on common HW-416-B specifications as of 2026 Compliance: RoHS (lead-free) for most variants

A critical warning often found in technical reports regarding this module involves the voltage regulator.

If your HW-416-B is triggering constantly without visible movement, check for the following environmental variables:

The is one of the most popular and cost-effective Passive Infrared (PIR) motion sensor modules available on the market. Often recognized by its white circular housing and three-pin male header, this board is a staple in Arduino, Raspberry Pi, and ESP32 projects. Despite its widespread use, finding a consolidated, accurate datasheet for the HW-416-B can be challenging, as it is frequently confused with the HC-SR501.