Hw-416-b Pir Sensor Datasheet Link File

The sensor requires 30 to 60 seconds to calibrate its baseline environment upon powering up. Random triggers during this period are normal.

This code is a typical example and can be easily adapted for other microcontrollers.

Passive Infrared (PIR) sensors are indispensable components in modern automation, security systems, and energy-saving lighting. The (often sold under similar codes such as HC-SR501, or as a generic "Mini PIR Motion Sensor Module") is one of the most widely used modules for detecting human or animal motion due to its high reliability, low cost, and ease of use. hw-416-b pir sensor datasheet

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.

After motion, the sensor stays HIGH for the set delay and then goes LOW, even if there is still movement. The sensor requires 30 to 60 seconds to

Some HW-416-B modules use an onboard 3.3V regulator , so the output pin is 3.3V – safe for 5V logic inputs (e.g., Arduino, STM32).

This guide serves as a functional datasheet and implementation manual for engineers and hobbyists alike. 1. Technical Specifications During this time, it may output unpredictable High/Low

Digital TTL High (3.3V) when motion is detected; Low (0V) otherwise. Detection Range: 3 to 7 meters (adjustable via potentiometer). Detection Angle: Approximately 110° to 120°. Delay Time: 0.3 seconds to 5 minutes (adjustable via potentiometer). Operating Temperature: -20°C to +80°C. Pinout Configuration How PIR Sensor Works and How To Use It with Arduino

The back of the HW-416-B PCB houses two potentiometers and a trigger mode jumper that allow you to fine-tune its behavior.

Note: Pin ordering can vary depending on the specific manufacturer batch. Always check the silkscreen labels printed on the back of the PCB before powering the module. 4. Module Adjustments and Operational Modes Potentiometer Controls

The HW-416-B does not "see" light like a camera. Instead, it detects .