| Feature | HW416B | HC‑SR501 | |---------|--------|----------| | | Yes (potentiometer) | Yes (potentiometer) | | Adjustable sensitivity | Yes (potentiometer) | Yes (potentiometer) | | 3.3 V operation | Via configuration pins (verified) | Requires regulator bypass | | Trigger mode jumper | Yes (repeat/non‑repeat) | Yes | | EMC certification | Listed in product specs | Not typically claimed | | Price | Similar (~US$3–5) | Slightly cheaper (~US$2–4) |
The HW416B outputs 3.3V, which is safe for 5V Arduinos, but 5V logic can damage 3.3V-only boards. To be better safe than sorry:
The HW-416B is a robust, low-power choice for security systems, automated lighting, and robotics. By leveraging its wide voltage range and internal digital filtering, you can achieve much more reliable results than with standard entry-level sensors. hw416b pir sensor datasheet better
| Parameter | Value | | :--- | :--- | | | DC 4.5V – 20V (5V is optimal) | | Standby Current | < 50µA (but often 60-70µA in reality) | | Output Signal | 3.3V TTL (HIGH when motion detected) | | Hold Time (Delay) | 5 seconds to 300 seconds (adjustable) | | Trigger Modes | L (Non-repeatable) / H (Repeatable) | | Detection Angle | < 110° | | Detection Range | 3 to 7 meters (adjustable) |
Adjustable (typically 2 seconds to 200 seconds). | Parameter | Value | | :--- | :--- | | | DC 4
The HW416B allows for adjustable delay time, which can be set using a potentiometer on the module. The delay time can be adjusted from 2-4 seconds.
: Ground reference. Must be shared with your microcontroller's ground. Onboard Adjustments : Ground reference
Always account for the in your system design. If you need immediate detection, consider keeping the sensor powered continuously or using a more sophisticated power management scheme.
The sensor is designed to work reliably at 5V, though its internal electronics actually run on 3V. This means you can use it with both 5V and 3.3V microcontrollers by following the appropriate wiring configurations.