Hw416b Pir Sensor Datasheet Better May 2026

void loop() if (motionDetected) digitalWrite(LED_PIN, HIGH); Serial.println("Motion detected!"); motionDetected = false; lastMotionTime = millis();

Turn the right potentiometer fully clockwise, then back off 15 degrees. This prevents saturation. Part 4: HW416B vs. HC-SR501 – Which Datasheet is Better? If you're comparing sensors, here is the truth the datasheets won't tell you: hw416b pir sensor datasheet better

// HW416B Better Interface - No delay() blocking, edge detection const int PIR_PIN = 2; const int LED_PIN = 13; HC-SR501 – Which Datasheet is Better

| Feature | HW416B | HC-SR501 | |---------|--------|----------| | Size | Smaller (32mm x 24mm) | Larger (48mm x 28mm) | | Voltage range | 3.0–5.5V | 4.5–20V | | Quiescent current | ~55µA | ~100µA (but stable) | | Retriggering jumper | Yes (poorly labeled) | Yes (clearly labeled) | | Built-in regulator | No | Yes (AMS1117 3.3V) | | Best for | Battery-powered, compact devices | Arduino projects, higher voltage | const int LED_PIN = 13

void motionISR() motionDetected = true;