Hw-416-b Pir Sensor Datasheet -

To use the HW-416-B with an Arduino Uno or similar 5V logic board:

Inadequate filtering or voltage fluctuations on the VCC line can cause false triggers. Add a 100µF decoupling capacitor across VCC and GND close to the sensor.

The sensor operates by detecting infrared radiation emitted by the human body. Operating Voltage: 4.5V to 20V DC (5V recommended). Static Current: Output Signal: hw-416-b pir sensor datasheet

The key IC on most HW-416-B boards is the (or a clone like the HT7610B). Referencing the BISS0001 datasheet can give you deeper insight into the timing and sensitivity adjustment.

Connecting the HW-416-B to an Arduino Uno requires no external resistors or complex circuitry. Wiring Diagram HW-416-B Pin Arduino Pin OUT Digital Pin 2 GND Arduino Example Code To use the HW-416-B with an Arduino Uno

The HW-416-B operates on the principle of pyroelectricity. It features a specialized infrared-sensitive crystal covered by a multi-segmented Fresnel lens to maximize its detection field. Core Specifications DC 4.5V to 20V (Commonly powered via 5V) Static Current Consumption: Less than 60µA

When using a Raspberry Pi with 3.3V logic, it is generally safest to power the sensor from the Pi’s rail to ensure compatibility. Alternatively, you can power the HW-416-B from 5V and rely on its output pin driving 3.3V levels safely (check your specific board for output voltage characteristics). Operating Voltage: 4

A PIR (Passive Infrared) sensor detects changes in incoming infrared radiation within its field of view. PIR sensors are specifically tuned to the frequency of IR that corresponds to normal human body temperature, making them highly effective motion detectors for people and animals. The sensor operates “passively”—it does not emit any energy but instead monitors the ambient infrared environment for changes caused by moving heat sources.

The sensor requires a "warm-up" time of 30–60 seconds when first powered on. During this time, it may output unpredictable High/Low signals.

Show you how to create a using this sensor and a buzzer.

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