[simpits-tech] Hall effect sensor question

[geneb]

On Sat, 20 Oct 2012, 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?

The devices I've worked with are only good for 180 degrees or a tiny bit 
less.

g.

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