Hw416b Pir Sensor Datasheet Better ★ Essential & Recommended

Because the HW-416B can give false triggers on power-up, use this code instead of the basic "Blink" sketch:

const int PIRpin = 2;
int pirState = LOW;
int val = 0;
void setup() 
Serial.begin(9600);
pinMode(PIRpin, INPUT);
Serial.println("HW-416B Warming up (30 sec)...");
delay(30000); // CRITICAL: Let the sensor stabilize
 hw416b pir sensor datasheet better
void loop() 
val = digitalRead(PIRpin);
if (val == HIGH && pirState == LOW) 
Serial.println("Motion Detected!");
pirState = HIGH;
else if (val == LOW && pirState == HIGH) 
Serial.println("Area Clear");
pirState = LOW;
delay(100); // Small debounce
 Because the HW-416B can give false triggers on

| Parameter | Value | Notes | | :--- | :--- | :--- | | Operating Voltage | DC 5V – 20V | Optimal performance at 5V or 12V | | Static Current | < 50 µA | Ultra-low power for battery applications | | Output Signal | 3.3V TTL (HIGH / LOW) | Compatible with 5V microcontrollers (3.3V logic is safe for 5V pins via voltage divider) | | Detection Angle | < 120° (cone shape) | Adjustable via lens masking | | Detection Distance | 3 – 7 meters (adjustable) | Factory default: ~5 meters | | Time Delay Adjust | 0.3 sec – 5 minutes (variable) | Two potentiometers control this | | Trigger Modes | Single (non-repeatable) / Repeatable (retriggering) | Jumper-selectable | | Operating Temperature | -15°C to +70°C | Reduced sensitivity in extreme cold | | Lens Type | Fresnel lens (white/translucent) | Included on top of the pyroelectric element | void loop() val = digitalRead(PIRpin); if (val ==

The most immediate advantage of this style of sensor is the size.