Hw416b Pir Sensor Datasheet Better New! Jun 2026

If the "HW416B" is the compact, dome-topped sensor often sold in multi-packs, it is but worse for breadboard prototyping compared to the standard HC-SR501. It excels in aesthetics and size but lacks the manual adjustment flexibility of larger sensors.

Pro tip: Set it to for debugging, otherwise you will think the sensor is broken because it ignores you for 30 seconds after the first wave.

The HW416B balances low-power draw with a highly resilient electrical footprint. The structural and electrical limits defined below must be strictly maintained to guarantee stable field operation. hw416b pir sensor datasheet better

The HW416B cannot directly power a relay, buzzer, or LED strip (it will drop voltage drastically).

if (val == HIGH) digitalWrite(LED_PIN, HIGH); if (pirState == LOW) Serial.println("Motion detected!"); pirState = HIGH; If the "HW416B" is the compact, dome-topped sensor

Includes a jumper for selecting between Single Trigger (L) and Repeatable Trigger (H) modes.

int ledPin = 13; int pirPin = 2; int pirState = LOW; int val = 0; void setup() pinMode(ledPin, OUTPUT); pinMode(pirPin, INPUT); Serial.begin(9600); void loop() val = digitalRead(pirPin); if (val == HIGH) digitalWrite(ledPin, HIGH); if (pirState == LOW) Serial.println("Motion detected!"); pirState = HIGH; else digitalWrite(ledPin, LOW); if (pirState == HIGH) Serial.println("Motion ended!"); pirState = LOW; Use code with caution. Conclusion The HW416B balances low-power draw with a highly

Here's where the HW-416B truly stands apart from many other PIR modules. The HW-416 has used to configure the device's behavior. One of these configuration pins can be used as a 3.3V power input.

The sensor requires an initial calibration period of 10 to 60 seconds after power-up before it will reliably detect motion. Don't expect immediate detection when you first apply power.