[sdiy] distance meter for keyboard, was: Where to get special white keys?

[cheater cheater]

And patented.
I know you can use patented things for DIY, though.

What about optical sensors?

D.

On Sun, Mar 1, 2009 at 9:59 AM, Ingo Debus <igg.debus at t-online.de> wrote:
>
> Am 28.02.2009 um 21:24 schrieb cheater cheater:
>
>> Then the next very difficult thing to do would be
>> to figure out the distance meter for the key: I would probably go for
>> something optical, and this assembly could be quite difficult, and
>> parts hard to source.
>
> Or you could use an analog (linear) hall sensor and a small magnet. This
> should not be too expensive, and easy to build.
>
> Ingo
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>