Hw-416-b Pir Sensor Datasheet [best]

| Problem | Likely Cause | Solution | |---------|--------------|----------| | No output | Warm-up period | Wait 60 seconds after power-on | | Always HIGH | SENS too high | Reduce SENS pot counter-clockwise | | Always LOW | Delay too short or SENS too low | Increase TIME or SENS pot | | False triggers | Vibration, RF noise, or heat sources | Mount securely; add 100nF cap across VCC/GND | | Short detection range | Lens dirty or SENS low | Clean lens; increase SENS |

The HW-416-B features two variable resistors (potentiometers) on the board that allow you to tune its behavior without rewriting a single line of code.

The HW-416-B features two adjustable potentiometers on the PCB: hw-416-b pir sensor datasheet

Adjustable from approximately 3 to 7 meters. Detection Angle: Approximately 110° to 120° cone. Operating Temperature: -15∘Cnegative 15 raised to the composed with power C +70∘Cpositive 70 raised to the composed with power C Pinout and Connections

| Feature | HW-416-B | HC-SR501 | |---------|----------|----------| | PCB Color | Red | Blue | | Voltage | 4.5V – 20V | 4.5V – 20V | | Delay range | 0.3s – 600s | 0.3s – 600s | | Block time | ~2.5s | ~2.5s | | Trigger jumper | Yes (H/L) | Yes (H/L) | | Dimensions | 32×24 mm | 32×24 mm | | Problem | Likely Cause | Solution |

| Component | Function | |-----------|----------| | | Adjusts output hold time (clockwise = longer) | | Sensitivity (Rx) | Adjusts detection distance (clockwise = more sensitive / longer range) | | Trigger mode jumper (L / H) | L = single trigger, H = repeat trigger | | Temperature compensation (some modules) | Helps reduce false triggers in hot/cold environments |

The sensor uses a simple 3-pin interface usually found under the white Fresnel lens: Connect to 5V power. making it compatible with Arduino

The module typically features a 3-pin interface, making it compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers. Power input (4.5V to 20V).