[simpits-tech] Hall effect sensor question

[dabigboy at cox.net]

That's encouraging! What I'm really wondering is if I can actually get usable readings if I rotate magnets in a complete 360* circle around the sensor? So you tried exactly this and it worked?

The great thing about these sensors is they are tiny, weigh practically nothing, and could measure position of something without introducing any mechanical load or requiring intrusive mechanical interfacing with the thing being measured.

Matt


---- Roy Coates <roy at flightlab.liv.ac.uk> wrote: 
> I dicked about with some Allegro A1302 devices and found them to be
> extremely smooth and consistent. Using Gene's 'pen' method I was getting
> good rotational readings with no dead spots.  I'm now using these in a
> linear fashion with no problems.
> 
> I think Gene has a youtube video showing this?
> 
> Roy.
> 
> 
> On 20 October 2012 22:18, <dabigboy at cox.net> wrote:
> 
> > Hey Gene (and anyone else who has played with Hall effect sensors), I am
> > working on something totally unrelated to flight controls at the moment,
> > but I am considering the use of Hall effect sensors. Question: if you
> > position a couple magnets around a Hall sensor, exactly how much of a
> > complete rotation can the sensor read? IOW, if you rotate the sensor (or
> > the magnets around the sensor) 360*, will you get a relatively linear
> > resistance curve out of the sensor? I'm guessing if you started with the
> > sensor in a position to read lowest (lowest resistance, basically), then at
> > 180* the resistance would be highest, and as you continued the rotation,
> > resistance would start going down again until returning to the original
> > starting point. No?
> >
> > If Hall sensors work something like this, then I think I may have a very
> > interesting use for them.
> >
> > Matt
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