Are you triggering a specific ? (like a relay , buzzer , or smart home automation event )
: As passive devices, they do not emit radiation but rather sense it, making them safe and low-power.
This controls how long the OUT pin remains HIGH after motion is detected. Turning clockwise increases the delay (up to several minutes); counter-clockwise reduces it (down to ~0.5 seconds). Trigger Mode Jumper (L vs. H):
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Supply voltage: 4.5V to 20V DC. Output voltage: 3.3V HIGH / 0V LOW (compatible with 3.3V and 5V microcontrollers) Detection range:
The HW-416-B includes two orange potentiometers and a trigger jumper to fine-tune its behavior: Potentiometers
When the environment is static, both halves receive the same amount of IR radiation, resulting in a balanced 0V output. When a warm body passes through the detection field, it intercepts one half of the sensor first, creating a positive differential change. As it leaves, it intercepts the second half, creating a negative differential change. The onboard IC processes this differential pulse and triggers the pin to go High. Are you triggering a specific
If you’re building a motion-activated light, security alarm, or smart occupancy sensor, you’ve likely come across the . At first glance, it looks identical to the famous HC-SR501. In fact, for practical purposes, the HW-416-B shares the same core components: a Pyroelectric Infrared (PIR) sensor , a BIS0001 (or similar) signal processing IC, and an adjustable lens.
The HW-416-B is a compact, passive infrared motion sensor designed to detect infrared radiation emitted by living beings. It is called "passive" because it does not emit any energy (like lasers or microwaves) but rather detects changes in the ambient IR radiation around it.
This comprehensive guide serves as an expanded datasheet and implementation manual for the HW-416-B. It covers its core technical specifications, operational mechanics, pin configuration, adjustment procedures, and step-by-step integration with microcontrollers like Arduino. 1. What is the HW-416-B PIR Sensor? Turning clockwise increases the delay (up to several
: The sensor is optimized to detect motion frequencies between 0.7 Hz and 30 Hz.
When motion is detected, the output goes HIGH. Even if the target keeps moving, the output drops to LOW once the delay timer expires.
High (3.3V) when motion is detected / Low (0V) when idle Detection Distance: Adjustable from 3 meters up to 7 meters Detection Angle: Less than 110-degree cone shape Delay Time: Adjustable from 0.5 seconds to 200 seconds
: Do not remove or damage the white plastic dome, as it is critical for the sensor's wide-angle detection.
You can safely use an HC-SR501 datasheet as a reference for the HW-416-B, but the specifications provided in this article are more accurate for the "B" revision.