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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
<br />
== Summary ==<br />
The Hall sensor uses a 49E Hall element with an on-board LM393 comparator. It provides both analog and digital outputs, operates from 2.3–5.3 V, and can be wired to Pico, STM32, and Arduino boards.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/9522 9522 – Hall Sensor]<br />
* [https://shop.jw-tech.eu/p/WSAL9522 WSAL9522 – Hall Sensor]<br />
<br />
== Technical overview ==<br />
* Sensor element: 49E Hall sensor; wide-range voltage comparator type LM393.<br />
* Power supply: 2.3 V to 5.3 V.<br />
* Dimensions: 27.0 mm × 15.5 mm; mounting holes 2.0 mm diameter.<br />
* Pinout: VCC (power), GND (ground), AOUT (analog data output), DOUT (digital data output).<br />
* Sensitivity is adjustable via a potentiometer; an onboard indicator LED reflects the output state.<br />
* Wiring for Raspberry Pi Pico: VCC→3.3 V, GND→GND, AOUT→GP26, DOUT→GP22.<br />
* Wiring for STM32F103RBT6: VCC→3.3 V, GND→GND, AOUT→PA6, DOUT→PA4.<br />
* Wiring for Arduino UNO: VCC→5 V, GND→GND, AOUT→A0, DOUT→D2.<br />
<br />
'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
sudo apt-get install p7zip-full<br />
cd ~<br />
sudo wget https://files.waveshare.com/upload/7/75/Hall-Sensor-code.7z<br />
7z x Hall-Sensor-code.7z -o./Hall-Sensor-code<br />
cd ~/Hall-Sensor-code<br />
cd ~/Hall-Sensor-code/Pico/c/<br />
cd build<br />
export PICO_SDK_PATH=../../pico-sdk<br />
cmake ..<br />
make -j9<br />
cp main.uf2 /media/pi/RPI-RP2/<br />
</syntaxhighlight><br />
<br />
== Notes and version constraints ==<br />
* The provided examples are version-specific (e.g., rp2-pico-20210418-v1.15.uf2 for MicroPython); compatibility must be verified when using other firmware versions.<br />
* STM32 examples target STM32F103RBT6 or STM32H743; other STM32 boards require porting the code yourself.<br />
* Flashing Pico firmware requires holding the BOOTSET button while connecting via USB – the step order must be followed exactly.<br />
* When using a Raspberry Pi Zero, run only “make” instead of “make -j9”.<br />
* The digital output is not monotonic with magnetic field strength: it may decrease once the field exceeds a certain level; behavior near the threshold should be verified practically.<br />
* The source gives no information on certifications, warranty, or safety compliance – these must be confirmed separately.<br />
<br />
== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Hall_Sensor Hall Sensor - Waveshare Wiki]<br />
* Source revision: 68900<br />
* Captured: 2026-08-29T09:32:53+00:00<br />
* SHA-256: <code>f080ec349d3aeabf75e5f4ebc10b4b3f44ad67225ef25319a7268e493d2d7542</code></div>JWTechPublisher