Keyboard Encoder

[patchell]

Harry Bissell wrote:

> can you say
> "LVDT" ?
>

    Of course you can, I knew you could!

    ;^)

>
> H^)
>
> patchell wrote:
>
> >     I am working on a keyboard encoder I had an idea for a long time
> > ago, but never tried. (this will go into the Paia 8700 keyboard I am
> > rebuilding).
> >
> >     It consists of a 5/16 in OD styrene tube, about 1.5 inches long.
> > The I.D. is 1/4".  On this tube, I wrapped two coils, about .75" long on
> > each have of the tube.  Inside the tube, I run a 1/4" Dia ferrite rod
> > that can move back and forth.
> >
> >     I apply a fairly high frequency signal to one coil, and look at the
> > output from the other coil.  As you move the ferrite rod into the tube,
> > the signal on the output increases as some function of the position.
> > (Not exactly linear, but that is not really important, I think).
> >
> >     Anyway, now that the idea at least shows promise, I will have to see
> > what I can do to make it come to life.  There are a few mechanical
> > problems that need to be solved (I am not much of a mechanical
> > engineer).  Plus, I am not sure exactly how to apply this to a keyboard,
> > but, I am sure I will come up with something.
> >
> >     **This was the perversion of the 8700 I was refering to in a
> > previous post.**
> >
> > --
> >  -Jim
> > ------------------------------------------------
> > * Visit:http://www.silcom.com/~patchell/
> > *-----------------------------------------------
> > *If you didn't buy a home in Santa Barbara,
> > * You didn't pay enough!
> > ------------------------------------------------

--
 -Jim
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* Visit:http://www.silcom.com/~patchell/
*-----------------------------------------------
*If you didn't buy a home in Santa Barbara,
* You didn't pay enough!
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