Raspberry PI Pico and A3144 Hall Effect Sensor

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Hall Effect sensor detects magnetic fields. In this video, I show how to connect the A3144 digital output Hall sensor to the Pico or RP2040. How to use it to trigger an LED to light on the detection of a magnet.
GitHub Repo for all of the examples in the video: github.com/jondurrant/RPIRP20...
To clone use the command:
$ github clone github.com/jondurrant/RPIRP20...
More information:
If you want to learn more about the techniques, I use in the video take a look at my courses
-- Introduction to Development Environment for Pico: www.udemy.com/course/introduc...
-- Raspberry PI Pico Micro Projects (C++): www.udemy.com/course/rpi-pico...
Sponsor: PCBWay: www.pcbway.com/
PCB prototyping, assembly, 3D printing, CNC, sheet metal fabrication and injection moulding.

[@edwardmurphy440]

I think we could use the internal pull-up resistor on an RP2040 GPIO pin rather than an external pull up to 3.3v; does that sound correct?

[@DrJonEA]

That is a good idea. I think you are quite right.

[@rafaelgonzalez5622]

Thank you very much! Very interesting sensor indeed. Just one question, why not use VSYS which is VBUS less the Schotty diode drop ? Is the tolerance on the A3144 too tight?

[@DrJonEA]

I could have done that and would have gained some protection from diode.

[@kennyhubbell813]

What would happen if you powered the device with 3.3V instead of 5V?

[@DrJonD]

Well it might work but it would be outside of spec and so no guarantees. Even if it did work doesn't mean the next one you pick up would.

[@kennyhubbell813]

@@DrJonD got it. Would it be correct to assume that powering the chip with 3.3v would not hurt the chip or gpio? It just might not work as expected?

[@DrJonEA]

Yes you would do no harm.