Hw416b Pir Sensor Datasheet Better Now
The output stays HIGH constantly or triggers randomly with no motion in the room.
| Feature | Typical cheap module (HC-SR501) | Better datasheet (e.g., Panasonic EKMB, Murata IRA) | |--------|--------------------------------|------------------------------------------------| | | none | µVpp output noise spectrum | | Lens data | generic | Specific radiation pattern, sensitivity vs angle | | Digital vs analog | digital output only | Raw analog + comparator option | | False trigger prevention | none | RF immunity, temperature drift curves | | Timing accuracy | ±20% RC-based | ±1% internal oscillator or external clock | | Field of view | fixed | Multiple lens options (wide, long, spot) |
The HW416B operates by measuring changes in the infrared radiation hitting its dual pyroelectric elements. A translucent, dome-shaped segments the environment into focal zones, maximizing its field of view. PIR Motion Sensor HW416B - Tayda Electronics hw416b pir sensor datasheet better
At first glance, it looks identical to the famous HC-SR501. In fact, the HW416B is often considered a direct, sometimes improved, clone of that design. But here is the problem every maker faces:
— slightly better doc, but still limited The output stays HIGH constantly or triggers randomly
| Feature | Standard HC-SR501 | HW416B / Mini PIR (Likely Target) | Winner? | | :--- | :--- | :--- | :--- | | | Large (32mm x 24mm) | Tiny (approx 10mm - 15mm) | HW416B | | Adjustability | Potentiometers for Time/Range | Usually Fixed (Hardware hacks needed) | HC-SR501 | | Aesthetics | Raw PCB, bulky | White dome, sleek | HW416B | | Power Use | Higher (~50uA - 60uA) | Lower (~15uA - 20uA) | HW416B | | Price | ~$1.50 - $2.00 | ~$1.00 - $1.50 | HW416B |
After the sensor detects motion and the output goes high, if further motion occurs during the delay time, the timer resets. The output stays high until motion ceases. It’s very likely one of these cases: 4
< 50uA (Excellent for battery-powered IoT devices). Output Level: High 3.3V / Low 0V.
It’s very likely one of these cases:
4.5V to 20V DC, making it highly compatible with 5V logic systems like Arduino and Raspberry Pi .