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This guide serves as a functional datasheet and technical overview to help you integrate the HW-416-B into your next project. 1. Technical Specifications
Less than 120-degree cone angle, up to 7 meters (adjustable via potentiometer) Operating Temperature: -20°C to +80°C Dimensions: Approx. 32mm x 24mm 2. Pinout and Hardware Configuration
The dual slots look at two distinct zones. hw-416-b pir sensor datasheet
The HW-416-B is notably smaller than the HC-SR501. Its compact form factor makes it ideal for wearable tech or small enclosure projects.
The HW-416-B is a PIR motion sensor designed to detect motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. Unlike active sensors, PIR sensors do not emit energy; they only "passively" receive infrared radiation.
The internal BISS0001 (or equivalent) IC amplifies this signal. This public link is valid for 7 days
Turning this clockwise increases the detection distance (up to ~7 meters). Turning it counter-clockwise decreases the range, which is helpful for small rooms to prevent false triggers.
Key specifications for the HC-SR501—functionally identical to the HW-416-B—confirm the wide input voltage range from 4.5V to 20V, making it compatible with both 3.3V and 5V logic systems.
Immune to ambient light interference and minor temperature fluctuations. Can’t copy the link right now
At midnight she tested again. The lamp obeyed: soft amber glow filling the room when she passed, conserving power the rest of the night. She smiled at the neatness of it—the way the datasheet’s sterile tables had translated into a living thing that answered a human need. The HW-416-B had become more than numbers; it was a small sentinel that watched over sleep and returned the favor with light.
The is a high-performance passive infrared (PIR) motion sensor module, widely recognized as a compatible or upgraded version of the industry-standard HC-SR501 . It is designed to detect human or animal movement by sensing changes in infrared radiation levels. Key Technical Specifications PIR Motion Sensor HW416B - Tayda Electronics
The jumper allows you to choose between two triggering methods:
if (val == HIGH) // Motion detected digitalWrite(ledPin, HIGH); if (pirState == LOW) Serial.println("Motion detected!"); pirState = HIGH;