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

[Gene Buckle]

On Thu, 4 Dec 2008, Roy Coates wrote:

>
>
> Using regular pots for poisition sensing is cheap and easy to do but there
> is a problem in obtaining the full rotation (270 deg ?) of the pot unless
> you build something like a gearbox or rack and pinion type affair.
>
> I had a cunning plan... because I'm using the circuit boards from some
> Logitech sticks, I wanted to get a 0 -> 100k reading from my pots without
> having to jump through hoops to get the full rotation. My cunning plan was
> to use 470k pots so that I only needed a partial rotation to get the
> desired resitance.
>
> But... wouldn't this draw additional current from the interface?
>
> I'm having trouble getting my head around this today so wanted some other
> (better) heads to consider it!!
>

Roy, are the pots wired so as to use all three legs or only two?

g.
-- 
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http://www.f15sim.com - The only one of its kind.