: The sensor outputs HIGH continuously with no motion present.
| 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 |
Security systems, automatic lighting, entry alerts, and home automation.
Here are a few simple code examples in different programming languages. hw-416-b pir sensor datasheet
Because the HW-416-B outputs a standard digital signal, connecting it to an Arduino Uno, Nano, or Mega requires only three wires and zero external pull-up or pull-down resistors. Wiring Diagram HW-416-B Pin Arduino Pin OUT Digital Pin 2 GND
When motion is detected, the output goes HIGH. If the target continues moving within the detection zone during the delay period, the internal timer resets, keeping the output HIGH until the target stops moving and the delay time elapses. 5. Circuit Schematic and Microcontroller Integration Interfacing with Arduino Uno
This knob adjusts the detection distance. Turning it clockwise increases the sensitivity (up to ~7 meters), while counter-clockwise decreases it. 4.2 Time Delay Adjustment (Potentiometer) : The sensor outputs HIGH continuously with no
The optional photoresistor and thermistor ports on some HW-416 variants enable and temperature compensation for enhanced functionality. With a light sensor connected, the module can disable motion detection during bright daylight and reactivate in darkness to conserve energy.
When a human walks past, they pass the first slot, causing a positive differential change. As they continue walking, they pass the second slot, causing a negative differential change.
The HW-416-B features a highly simplified 3-pin interface, making it exceptionally easy to wire to any microcontroller. Pin Configuration Because the HW-416-B outputs a standard digital signal,
Turning clockwise increases the "ON" time after motion is detected. Tip: Turn fully counter-clockwise for a short (~ second) delay, which is best for initial testing. Trigger Jumper
When designing a circuit around the HW-416-B, staying within its electrical limits ensures longevity and prevents false triggering. Below are the core parameters typically found in its engineering datasheet: Specification / Value 4.5V to 20V DC (5V standard) Output Signal (Digital) High (3.3V) / Low (0V) Static Current Consumption < 50 µA to 65 µA Detection Distance 3 meters to 7 meters (adjustable via onboard potentiometer) Detection Angle < 100° to 110° cone angle Delay Time 0.5 seconds to 200 seconds (adjustable) Blockade Time 2.5 seconds (default) Trigger Modes L (Non-repeatable) / H (Repeatable - Default) Operating Temperature -15°C to +70°C PCB Dimensions Approx. 32mm x 24mm 3. Pinout and Hardware Configuration
Digital output. It sends a High (3.3V) signal when motion is detected and remains Low (0V) when idle. GND: Ground connection.
Power input (Connect to 5V DC of your microcontroller or external power source).