Help, understanding adjustable HALL Sensor from Aliexpress

[Lenny]

Can someone explain how this adjustable Hall switch should work?

https://de.aliexpress.com/item/1997096887.html?spm=a2g0s.9042311.0.0.79ab4c4dhvrgbO

These switches are sold by various suppliers.
I bought one, and after I couldn't deal with it, I did some research.

In principle, the A3144 used is already a digital switch. In my opinion, a linear Hall switch would have to be used for the circuit to work?!

With the A3144, the entire comparator circuit is useless. The analog output can also only take 5V or 0V.
Or did I miss something?

[mikerj]

Don't think you have missed anything, the external comparator is useless if the intention is to change the operating distance.

[Doctorandus_P]

There are different kinds of hall switches.
Some of them output an analog voltage depending on the strength of the magnetic field. This is the only kind that makes sense with a comparator.

Hall sensors often are also unipolar, they only generate generate a usable output with one polarity of the magnetic field, an they also have a limited detection range. If you use Nibidibibibium magnets, they may be too strong and seem to generate only an on/off because the linear range is small.

You can try soldering a wire directly to the output pin of the sensor, and measure the output voltage that goes to the comparator. This gives you a much better understanding than just seeing the output of the comparator turn on or off.

If you want to experiment on this level, I also recommend to buy a few loose Hall sensors, they are quite cheap.

Fans in PC's usually also have Hall sensors in them, but they are the switching kind with built in comparator.

[Mechatrommer]

i suggest next time please provide link to english site. not everybody can read germany..

[5af734377e]

Try Octave first and see if it has what you need.  There is a bit of awkwardness getting it to load the toolboxes (Google for this) whereas MATLAB seems to do it by automagic.  There is no Simulink equivalent if that becomes necessary but Tutuapp 9apps Showbox Google for 'octave simulink equivalent' and see if it gets you anywhere.

[mikerj]

There are different kinds of hall switches.
Some of them output an analog voltage depending on the strength of the magnetic field. This is the only kind that makes sense with a comparator.

The A3144 fitted to this board has a digital output, so the comparator is useless.

i suggest next time please provide link to english site. not everybody can read germany..

You could just select English from the menu at the top of the website...