If you’ve landed on this page, you’re likely tired of digging through fragmented, incomplete, or poorly translated datasheets for the HW416B PIR sensor . You want a better resource—one that doesn’t just list pinouts but explains how to use this sensor reliably in real-world projects.
volatile bool motionDetected = false; unsigned long lastMotionTime = 0; const unsigned long MOTION_HOLD_MS = 3000; // Match sensor's delay hw416b pir sensor datasheet better
void loop() if (motionDetected) digitalWrite(LED_PIN, HIGH); Serial.println("Motion detected!"); motionDetected = false; lastMotionTime = millis(); If you’ve landed on this page, you’re likely
Use the output pin to drive an NPN transistor (2N2222 or BC547) or a MOSFET (2N7000). Example: Example: | Feature | HW416B | HC-SR501 |
| 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 |