Hw-416-b Pir Sensor Datasheet [2021] Link

The HW-416-B is a standard Passive Infrared (PIR) motion sensor module, frequently used in DIY electronics projects with microcontrollers like Arduino, Raspberry Pi, and ESP32. It is essentially a variant of the widely documented HC-SR501 module. Technical Specifications Operating Voltage: typically 4.5V4.5 cap V 12V12 cap V Output Signal: Digital HIGH ( 3.3V3.3 cap V ) when motion is detected; Digital LOW ( ) when idle. Detection Range: Adjustable up to meters (approx. Detection Angle: Approximately 110∘110 raised to the composed with power Quiescent Current: Extremely low, often less than Time Delay: Adjustable from approx. seconds to seconds via on-board potentiometer. Pinout and Connections

The module typically features three pins, usually marked on the PCB or under the white Fresnel lens: VCC: Power input ( is recommended for most applications). OUT: Digital output signal ( 3.3V3.3 cap V GND: Ground connection. On-Board Adjustments

The HW-416-B includes two orange potentiometers and a trigger jumper to fine-tune its behavior: Potentiometers

Sensitivity (Sx): Turning clockwise increases the detection distance. hw-416-b pir sensor datasheet

Delay (Tx): Turning clockwise increases the "ON" time after motion is detected. Tip: Turn fully counter-clockwise for a short (~ second) delay, which is best for initial testing. Trigger Jumper

Single Trigger (L): Once motion is detected, the output stays HIGH for the set delay and then goes LOW, even if movement continues.

Repeatable Trigger (H): (Default) The output stays HIGH as long as motion is continuously detected, resetting the delay timer with each movement. The HW-416-B is a standard Passive Infrared (PIR)

💡 Quick Pro-Tip: PIR sensors require a "warm-up" period of about 30 to 60 seconds after powering on to calibrate to the environment's infrared signature. During this time, you may get false triggers.

If you tell me which microcontroller you're using (like an Arduino Uno or Raspberry Pi), I can provide a specific wiring diagram and code snippet to get your sensor running. PIR Motion Sensor HW416B - Tayda Electronics

The is a high-performance passive infrared (PIR) motion sensor module, frequently used as a direct, reliable replacement for the standard HC-SR501. It detects human and animal movement by sensing changes in infrared radiation emitted by warm objects. Core Specifications is electrically and physically identical to the Go to product viewer dialog for this item. Power-on (0s): Output is LOW

, offering tight component tolerances for stable performance in varying temperatures. Specification Operating Voltage DC 4.5V – 20V Static Current Output Level 3.3V (High) / 0V (Low) Detection Range Adjustable from 3m to 7m Detection Angle < 120° cone angle Delay Time Adjustable (approx. 0.3s to 5 minutes) Operating Temp -20°C to +80°C Pinout & Wiring HC-SR501 PIR MOTION DETECTOR

Timing Diagram (Crucial for Firmware Design)

Based on behavior observed from multiple HW-416-B units:

Power-on (0s): Output is LOW. The sensor calibrates for 30–60 seconds. Do not trigger during this period.
Detection: When motion is sensed, OUT goes HIGH instantly (within 10 µs of detection).
Lock-down: After motion stops, the output remains HIGH for the preset lock-down time (e.g., 2.5 seconds).
Retriggering: If motion is detected during the lock-down period, the timer resets. The output stays HIGH continuously until no motion occurs for a full lock-down period.
Recovery: After output falls LOW, the sensor is ready to detect again immediately (no dead time).

Motion:    |----|         |----|
OUT:       HIGH___________HIGH______LOW
            |< 2.5s >|   |< retriggered >|

Troubleshooting Common Issues

Issue 3: Output stays HIGH forever

Cause: Continuous motion or stuck retrigger.
Fix: The HW-416-B has automatic retrigger; if any motion (including vibration) is present, it will reset the timer. Isolate the sensor from vibrations.

Comparison: HW-416-B vs HC-SR501

Many buyers confuse the HW-416-B with the HC-SR501. Here is a side-by-side comparison based on typical datasheet values:

Verdict: Choose the HW-416-B for low-power IoT sensors or motion-activated sound effects. Choose the HC-SR501 for hallway lights or alarm systems requiring a long output pulse.