[sdiy] Resistive touch panels

[Paul Maddox]

Ian,

  I thought about it a lot a few years back, I always wanted something
like this - http://images.businessweek.com/ss/06/05/star_trek/image/starshipenterpriseeconsole.jpg

  With the idea that you could 'position' the controls (knobs,
switches, etc) anywhere they wanted on the control surface. At the
time, there was no 'multi-touch' ability in touch screens, now there
is and things like the reactable control surfaces seem to be gaining
popularity it may be possible to do something like I wanted now.

 FWIW most touch screens just use two resistive elements and you just
need to feed them into a voltage divider and opamp to get voltages out
of them (check the manufacturers datasheet).

Paul

On Sat, Sep 6, 2008 at 2:39 AM, Ian Smith <taciturn_unquiet at hotmail.com> wrote:
>
> Hi all,
>
> Has anyone considered using resistive touch panels for control? like a joystick, if that's possible? Here's what I'm looking at:
> http://www.fujitsu.com/downloads/MICRO/fcai/touchpanels/4_wire_standard_ds_rohs.pdf
> It says that they have an x-axis resistance of 300 to 850 Ohms and a y-axis resistance of 100 to 600 Ohms. I don't know how useful that would be, but I keep thinking about the Korg Kaoss pad series. Can these be used by themselves or do they need special control circuits to use them the way I'm thinking of?
>
> Thanks,
>
> -Ian
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