Hw-416-b Pir Sensor Datasheet Here

| Pin | Name | Description | |-----|------|-------------| | 1 | VCC | Power input (4.5V – 20V DC) | | 2 | OUT | Digital output (HIGH = motion detected, LOW = idle) | | 3 | GND | Ground (0V) |

| Feature | Common Assumption | Technical Reality | | :--- | :--- | :--- | | Chipset | Custom IC | BIS0001 (Generic PIR Controller) | | Distance Pot | Adjusts range (meters) | Adjusts Amp Gain (sensitivity to motion size) | | Time Pot | 0.3s to 5 mins | Determined by RC constant on Chip Pin 8; usually accurate to the label. | | Logic Mode | Always ON when moving | Requires soldering jumper to 'H' for "Always ON" behavior. | hw-416-b pir sensor datasheet

Recommendation: If you are integrating this sensor, treat the "Distance" potentiometer as a "Motion Size" filter, not a range extender. If you need true range adjustment, you must physically swap the Fresnel lens dome, not turn the screw. | Pin | Name | Description | |-----|------|-------------|

Based on behavior observed from multiple HW-416-B units: The HW-416-B features two adjustable potentiometers on the

Motion:    |----|         |----|
OUT:       HIGH___________HIGH______LOW
            |< 2.5s >|   |< retriggered >|

The HW-416-B features two adjustable potentiometers on the PCB:

Before diving into the electrical characteristics, here are the headline features of the HW-416-B: