[chbot] Hall Effect Sensor

[Charles Manning]

Apart from setting up the ADC (which is hardware dependent) there's nothing 
much to it. Just read the ADC. 

What are you trying to do with this? Unless you need an analogue measurement 
it is way easier to interface to a switch type hall effect sensor eg. 
http://www.sicom.co.nz/xurl/PageID/2214/function/viewprd/prd_id/172816/pmm_id/0/hall-effect-switch-3-pin-sil.html

-- CHarles


On Friday 17 July 2009 13:30:51 jimmy allen wrote:
> i have ordered a part from brightsparks part code UGN3503U
> which i think is an analog one
> i am planning to use it with a propeller but i can understand some basic
> AVR C so that would be fine(comments would be even more useful) but just
> long as i can understand it it will be fine
>
> cheers
>
> On 7/17/09, Charles Manning <manningc2 at actrix.gen.nz> wrote:
> > On Thursday 16 July 2009 19:18:27 jimmy allen wrote:
> >> for a project i am thinking about using a HES
> >> i have ordered one (a UGN3503U) and i am not too sure how to program
> >> one. so i was looking for a piece of sample code if anyone has worked
> >> with the before.
> >
> > It depends on the sensor you use. South Island component centre has a
> > selection.
> >
> > There are basically three main types:
> > * Analogue: Attach to an ADC pin and make an ADC reading.
> > * Unipolar Switch: Open collector. It looks like a switch to ground that
> > turns
> > on when the magnet is close (polarity sensitive - only reacts to North or
> > South, I forget which). Turns off when the magnet goes away. You just
> > hook this up to an input pin with a pull-up (like a touch switch etc). *
> > Bipolar switch: Like Unipolar switch, but needs to be actively turned
> > off.
> >
> > Turns on with North and turns off with South (or vice versa, I forget
> > which).
> >
> >
> > If you want code, you'll need to say what micro you're using.
> >
> > -- CHarles
> >
> >
> >
> >
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