is a high-performance Passive Infrared (PIR) motion sensor module, frequently cited as an equivalent or alternative to the popular
The HW416B can be better for low-power, 3.3V systems (ESP32, Raspberry Pi Pico) if you follow the power filtering advice above. Otherwise, the HC-SR501 is more forgiving.
The specified operating range is , but real‑world testing reveals important nuances: hw416b pir sensor datasheet better
For ESP32 deep sleep applications, connect HW416B OUT to a wake-up pin and use esp_sleep_enable_ext0_wakeup() .
For more technical details and alternative sensor modules, you can explore the Tayda Electronics HW416B listing or read the Adafruit PIR sensor guide . Conclusion is a high-performance Passive Infrared (PIR) motion sensor
| Parameter | Value | | :--- | :--- | | | Passive Infrared (PIR) | | Operating Voltage | 5V - 20V (Typical 5V) | | Output Voltage | 3.3V HIGH / 0V LOW | | Current Draw | < 65 mA (Active) / ~50 μA (Standby) | | Detection Range | 3 to 7 meters (Adjustable) | | Detection Angle | ~110° cone | | Time Delay (Ton) | 3 seconds to 5 minutes (Adjustable) | | Blocking Time (Toff) | ~2.5 seconds (Fixed) | | Trigger Modes | H (Repeatable) / L (Non-repeatable) | | Warm-up Time | 30 to 60 seconds | | Operating Temp. | -15°C to +70°C | | Dimensions | ~32mm x 24mm x 24mm | | Mounting | Flange with two mounting holes |
Integrating the HW-416B with an Arduino Uno, Nano, or ESP32 is straightforward since it outputs a clean digital signal. Wiring Diagram Connect HW-416B to Arduino 5V Connect HW-416B GND to Arduino GND Connect HW-416B OUT to Arduino Digital Pin 2 Optimized Arduino Sketch For more technical details and alternative sensor modules,
The two extra pins (sometimes referred to as “configuration pins”) can be used to change the module’s operating mode. Connecting a jumper between them alters the trigger behaviour (repeat/non‑repeat). When powered at 3.3 V, the correct pin to use is the one shown in Figure 3 of many HW‑416 tutorials—not the other unlabelled pins.
The HW416B balances low-power draw with a highly resilient electrical footprint. The structural and electrical limits defined below must be strictly maintained to guarantee stable field operation.
Controls how long the output remains High after motion stops. Operating Modes
