Adjustable from 0.3 seconds to 5 minutes (up to 300s). Blockade Time: 2.5 seconds by default. Operating Temperature: -15°C to +70°C. HW416B vs. Standard PIR Sensors: Why It’s "Better"
According to the HW416B Datasheet , the module operates on a wide voltage range and offers precise control over detection behavior: 5V to 20V DC.
The HW416B features a jumper setting that allows you to choose between two trigger modes, significantly enhancing its utility in different scenarios: hw416b pir sensor datasheet better
pinMode(PIR_PIN, INPUT_PULLDOWN);
Understanding the electrical limits of the HW-416B prevents component damage and ensures reliable motion detection. Specification DC 4.5V to 20V 5V or 12V regular rails work best Static Current Ideal for battery-powered setups Output Level High 3.3V / Low 0V Digital TTL signal Trigger Modes L (Non-repeat) / H (Repeat) Set via onboard jumper or solder pads Delay Time Adjustable (0.5s to 200s+) Controlled by onboard potentiometer Blockade Time 2.5 seconds Default lock time between triggers Detection Angle < 100° cone angle Dependent on Fresnel lens alignment Detection Distance Up to 7 meters Adjustable via potentiometer Operating Temp -20°C to +80°C Extreme temps affect sensitivity 📌 Pinout Configurations Adjustable from 0
Unlike the HC-SR501, many HW-416B modules do not have 5V tolerant logic outputs. The output pin is 3.3V. Do not connect it directly to a 5V-only Arduino input without a level shifter, or you may damage the sensor over time.
is a widely used PIR (Passive Infrared) motion sensor module, frequently sold as a variant or high-sensitivity alternative to the HC-SR501 . It is designed to detect human or animal movement by sensing changes in infrared radiation. Technical Specifications HW416B vs
The HW-416B requires a stabilization period (usually 10–60 seconds) after powering up. During this time, the sensor "learns" the ambient infrared signature of the room. Ensure your code ignores signals during this initialization phase.
The sensor is designed to work reliably at 5V, though its internal electronics actually run on 3V. This means you can use it with both 5V and 3.3V microcontrollers by following the appropriate wiring configurations.
The HW-416B is a robust, low-power choice for security systems, automated lighting, and robotics. By leveraging its wide voltage range and internal digital filtering, you can achieve much more reliable results than with standard entry-level sensors.