2.5 seconds (default time the sensor ignores movement after an output cycle)
int pirPin = 2; int ledPin = 13;
The HW-416-B is built around the —a highly capable infrared sensing signal processor IC designed specifically for pyroelectric infrared applications. hw-416-b pir sensor datasheet
Increases sensitivity (detects motion further away, up to 7m).
Motion detection is a foundational element of modern automation, security systems, and smart home technology. Among the various tools available to hobbyists and engineers alike, Passive Infrared (PIR) sensors are the most popular for detecting human presence. While many are familiar with the classic HC-SR501, the has emerged as a highly reliable, compact, and efficient alternative. Among the various tools available to hobbyists and
When a warm body passes from one zone to another, the sensor detects a differential shift in IR radiation.
void setup() pinMode(ledPin, OUTPUT); pinMode(inputPin, INPUT); Serial.begin(9600); void setup() pinMode(ledPin
: Controls how long the "High" signal persists after motion is detected.
The sensor requires 30 to 60 seconds to calibrate its baseline environment upon powering up. Random triggers during this period are normal.
This guide serves as a functional datasheet and technical overview to help you integrate the HW-416-B into your next project. 1. Technical Specifications