Ukryj
Turning this clockwise increases the duration the output pin stays HIGH after motion is detected. Turning it counter-clockwise reduces the hold time. Operating Modes (Trigger Jumpers)
A critical warning often found in technical reports regarding this module involves the voltage regulator.
(Default) The output stays HIGH as long as motion is continuously detected, resetting the delay timer with each movement. hw-416-b pir sensor datasheet
The white, plastic dome is not just a protective cover; it is a Fresnel lens. It serves two purposes:
| Pin | Name | Description | |-----|------|-------------| | 1 | VCC | Power supply (5V typical, compatible with 4.5V–20V) | | 2 | OUT | Digital output: HIGH (3.3V) on motion detection, LOW when idle | | 3 | GND | Ground connection | Turning this clockwise increases the duration the output
In the world of DIY electronics, few components offer as much "bang for your buck" as the Passive Infrared (PIR) sensor. The is a popular iteration of the classic HC-SR501 design, repackaged into a smaller, more breadboard-friendly form factor.
When a warm body (like a person) moves across the sensor's field of view, the infrared level changes rapidly. The crystal generates an electrical charge in response to this change, triggering the alarm. (Default) The output stays HIGH as long as
When the environment is static, both slots receive the same amount of IR radiation. The differential cancelation results in a net zero signal.
