Hw-416-b Pir Sensor Datasheet

The HW-416-B is a PIR motion sensor designed to detect motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. Unlike active sensors, PIR sensors do not emit energy; they only "passively" receive infrared radiation.

If motion is detected while the output is already high, the "delay timer" restarts. The output stays high as long as there is continuous movement. 5. Typical Applications

When you first apply power to the HW-416-B, it requires a initialization/warm-up phase lasting anywhere from . During this time, the sensor samples the ambient infrared signature of the room to establish its baseline. The output pin may trigger randomly during this phase, which is normal. Your code should account for this behavior by implementing a delay before listening for active interrupts. 6. Applications and Troubleshooting Common Implementations hw-416-b pir sensor datasheet

The module typically features a 3-pin interface for easy connectivity: : Power supply input (4.5V – 20V).

The HW-416-B features two potentiometers (yellow knobs) and one jumper for customizing behavior. 4.1 Sensitivity Adjustment (Potentiometer) The HW-416-B is a PIR motion sensor designed

The sensor can be triggered by rapid temperature changes, sunlight, or small animals.

Note: Lockout time (approx 2 seconds) after OUT goes LOW – sensor ignores motion to prevent oscillation. The output stays high as long as there

Controls how long the OUT pin remains HIGH after motion is detected. Turn clockwise to increase the delay time (up to several minutes). Trigger Mode Jumper:

if (motionState == HIGH) digitalWrite(ledPin, HIGH); Serial.println("Motion Detected!"); delay(100); else digitalWrite(ledPin, LOW);