keyboard contact rubber fun

[Jim Patchell]

    One thing I always wanted to try was using an iron plunger going into an
inductor.  The only thing that stopped me was it seemed like an awful lot of
work, both mechanical and electronic.  But this should be able to give you a
signal that is proportional to how far the key is pressed down.  It has some
very interesting posibilities.

Tony Allgood wrote:

> Sounds a good idea to replace these things... and I have to replace the
> whole set of contacts in a D-50 tomorrow morning.
>
> But we have to think about velocity too, and aftertouch. The Prophet T-8
> had some sort of opto thing, it worked very well according to some. But
> little magnets and hall effect things could work too. And you could get
> really bizarre glissandos going by rubbing the keyboard up and down with
> a big loudspeaker magnet.
>

    Now, this idea I like!  It has a lot of posiblities as well.

    Another magnet idea is hall effects sensors.  I think some of these will
also give a signal that is proportional to the where abouts of the magnet,
if I am not mistaken.

>
> Regards,
>
> Tony Allgood  Penrith, Cumbria, England
>
> Modular synth circuits, TB303 clone and Filter Rack
> www.techrepairs.freeserve.co.uk/projects.htm
> My music: www.mp3.com/taklamakan

    -Jim