Hw-416-b Pir Sensor Datasheet !!top!! Instant

While the specific model number HW-416-B appears to be a variance or specific batch code of the standard HC-SR501 PIR sensor (commonly found in Arduino starter kits), the "interesting report" regarding this device isn't a standard datasheet. Instead, the most compelling technical analysis focuses on the incredible complexity hidden inside a cheap sensor and the common myths about its potentiometers.

Limitations & cautions

• No directional/velocity measurement—only motion presence via thermal change.
• Susceptible to sudden environmental temperature shifts, drafts, and moving heat sources (e.g., HVAC vents).
• False positives possible from direct sunlight, heating pipes, or moving curtains.
• Performance degraded through glass or behind insulating materials; IR-transparent openings required.

• High sensitivity and reliability
• Low power consumption
• Adjustable sensitivity and delay time
• Digital output signal
• Compact size (typically 32mm x 24mm x 10mm)

• Operating Voltage: 4.5V – 20V DC (Typical 5V)
• Quiescent Current: < 50 µA (Ultra-low power)
• Detection Range: Up to 7 meters (adjustable)
• Sensing Angle: < 100° cone angle (approx. 110° with stock lens)
• Output Signal: 3.3V TTL logic (High when motion detected)
• Lock-down Time: 2.5 seconds (default, non-adjustable on some variants)
• Operating Temperature: -20°C to +80°C
• PCB Dimensions: 32mm x 24mm

Note: Some HW-416-B modules use an onboard 3.3V regulator, so the output pin is 3.3V – safe for 5V logic inputs (e.g., Arduino, STM32). hw-416-b pir sensor datasheet

| Feature | HW-416-B | HC-SR501 | | :--- | :--- | :--- | | Size | Smaller (32x24mm) | Larger (32x24mm approx, thicker) | | Quiescent Current | < 50 µA | < 65 µA | | Adjustable Time Delay | Usually fixed or very short (2.5s) | Yes (0.3s – 600s) | | Retriggering Mode | Internal (automatic) | Jumper-selectable (single/retrigger) | | Best for | Battery-powered, short-lived triggers | Security lights, long delays | While the specific model number HW-416-B appears to