Hw-416-b Pir Sensor Datasheet [patched] Online

Increases detection distance (up to ~7 meters).

What are you trying to trigger (a relay, a buzzer, an LED strip)?

Interfacing the HW-416-B with an Arduino Uno is straightforward due to its digital 3.3V output, which is fully compatible with standard 5V microcontroller input pins. Wiring Diagram HW-416-B Pin Arduino Pin OUT Digital Pin 2 GND Sample Code hw-416-b pir sensor datasheet

Passive Infrared (PIR) sensors are the backbone of modern security systems, automated lighting, and smart home robotics. Among the various budget-friendly modules available to makers and engineers, the stands out for its compact form factor, reliability, and ease of integration.

For a 3.3V logic system (like an ESP32), you can power the module using the dedicated 3.3V configuration pin instead of the standard 5V input, as described in the previous section. Increases detection distance (up to ~7 meters)

This controls how long the OUT pin remains HIGH after motion is detected. Turning clockwise increases the delay (up to several minutes); counter-clockwise reduces it (down to ~0.5 seconds). Trigger Mode Jumper (L vs. H):

is a common Passive Infrared (PIR) motion sensor module, widely recognized as an equivalent or specific variant of the Wiring Diagram HW-416-B Pin Arduino Pin OUT Digital

Avoid placing the sensor directly opposite windows, radiators, AC vents, or incandescent light bulbs. Rapidly shifting air temperatures mimic body heat signatures.