int motionPin = 2; int ledPin = 13;
The HW-416-B output is . To safely interface with 3.3V logic: hw-416-b pir sensor datasheet
The module typically features a 3-pin interface for easy connectivity: : Power supply input (4.5V – 20V). int motionPin = 2; int ledPin = 13; The HW-416-B output is
modules include a jumper to switch between two trigger modes: Non-Repeatable Trigger (L): int motionPin = 2
: The onboard potentiometer allows users to increase or decrease the detection range. High sensitivity can detect living beings up to 9 meters away.
This makes coding incredibly simple. You don't need complex analog-to-digital conversion; you simply check if a digital pin is HIGH. If it is, sound the alarm.