Do not connect the output directly to a high-current load (e.g., a relay or LED strip). Use a transistor or an optocoupler for isolation.
Passive Infrared (PIR) sensors are the backbone of modern security systems, automated lighting, and smart home automation. Among the various modules available to hobbyists and engineers, the stands out as a highly reliable, compact, and low-power solution for motion detection.
| Parameter | Min | Typ | Max | Unit | |----------------------|------|------|-------|-------| | Supply voltage | 4.5 | 5 | 20 | V | | Output high voltage | 2.8 | 3.3 | 3.4 | V | | Output low voltage | 0 | 0.4 | 0.6 | V | | Output current (max) | - | - | 100 | mA | | Standby current | - | 0.05 | 0.1 | mA | | Operating temp | -20 | 25 | +80 | °C | | Delay time range | 0.5 | - | 200 | sec | | Detection range | 3 | 5 | 7 | m |
The output goes high upon motion and drops low after the delay time, regardless of whether the object is still moving in front of it. hw-416-b pir sensor datasheet
When powered on, the HW-416-B requires anywhere from 10 to 60 seconds to calibrate itself to the ambient infrared signature of the room. False triggers during this time are completely normal.
The white dome is a Fresnel lens . It focuses infrared light from multiple angles onto the tiny pyroelectric sensor inside. PIR Motion Sensor HW416B - Tayda Electronics
The module has three main pins, typically arranged as follows: Description Connection Power Supply 5V - 12V DC OUT Digital Output 3.3V High (Motion) / 0V Low (Idle) GND Ground (0V) Do not connect the output directly to a high-current load (e
This comprehensive guide serves as an expanded technical datasheet and practical integration manual for the HW-416-B module. You will learn its technical specifications, pinout configurations, internal mechanics, and how to interface it with microcontrollers like Arduino. 1. Product Overview
Functionally identical; only PCB layout and color differ.
Turning off desk monitors, lights, or exhaust fans when a room becomes vacant. Among the various modules available to hobbyists and
Clockwise rotation increases the duration the output pin stays "HIGH" after detecting motion. Counter-clockwise rotation decreases the time down to roughly 5 seconds. How the HW-416-B Works
Some variants include a fourth pin (low-power mode or temperature compensation), but the HW-416-B is almost always 3-pin.
The following sketch reads the state of the HW-416-B sensor. It turns on the built-in Arduino LED (Pin 13) and prints alerts to the Serial Monitor when motion is detected.
Whether you are building an intruder alarm or an automated energy-saving light switch, understanding the technical specifications and operational boundaries of this component is critical. This comprehensive technical guide serves as a datasheet and implementation manual for the HW-416-B module. Technical Specifications (Datasheet Summary)