[simpits-tech] Using Pots for position sensing (part 2)

[Jamie]

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From: "Sean Galbraith" <sean.g at paradise.net.nz>
Sent: Thursday, December 04, 2008 6:34 PM
To: "Simulator Cockpit Builder's List" <simpits-tech at simpits.org>
Subject: Re: [simpits-tech] Using Pots for position sensing (part 2)

> At 04:08 a.m. 5/12/2008, you wrote:
>> >
>> > The only issue now is one of resolution... hmm... I need some cunning
>> > rather than time-consuming engineering.
>> >
>>
>>Roy, the only way you're going to increase the resolution is to increase
>>the sample size.  I suspect that the logitech stick uses a three wire pot,
>>in which case it's configured as a voltage divider.  Most off the shelf
>>joystick use a 10 bit sample rate which will give you a resolution of 0 to
>>1024.  This is of course a huge improvement over the old style "analog"
>>joysticks that PCs used to use - those were 8 bit samples. (0..255).
>>
>>If you want to go to a 12 bit sample size, you can get one of Leo Bodnar's
>>BU0836A controllers.  They provide for 8 axes and 32 button inputs and the
>>sample range is 0..4096.  This should be plenty for what you're trying to
>>do.  The good thing is that he's local to you and the device is listed as
>>(insert funny pound sign here)24.
>>
>>Here's a link to the '386A: http://www.leobodnar.com/products/BU0836A/
>
> I can only add a "use them they are great" comment... I've used a
> couple of Leo's boards now and have no reason to not keep on buying
> them!  I like the "X" version (which I haven't bought yet) which has
> really simple push connectors... brilliant for a relatively simple,
> or quick project
>
> SeanG
>
Agreed - im sitting here with 5 of them and ill be ordering more after 
Christmas I have mine all customized with unique names to help with 
calabration.

The X version is the one ill be ordering, I only wish it was available when 
I ordered the others.
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