[Lab] Touch sensitive/reactive windows

Andrew O'Malley aomalley at gmail.com
Mon Mar 14 15:47:21 EDT 2011


Thanks for your ideas/suggestions everyone -- I'm hearing the idea of
conductive coatings or conductive plastic a lot, anyone have any leads
where I would acquire such things?

Thanks again,

On Mon, Mar 14, 2011 at 1:32 PM, Jean-Marc LeBlanc
<jeanmarc.leblanc at gmail.com> wrote:
> you can also use a project like this one
> http://www.43oh.com/2010/09/capacitive-sensing-with-the-msp430-launchpad/
> I am not sure if it would work, but if you could use clear conductive
> paint or a cleat conductive plastic instead of the foil.
> Jean-Marc Le Blanc
> ---
> "Do you pine for the nice days of Minix-1.1, when men were men and
> wrote their own device drivers?" Linus Torvalds
> On Sun, Mar 13, 2011 at 2:30 PM, Andrew O'Malley <aomalley at gmail.com> wrote:
>> Hi gang,
>> I'm working on a an interactive light piece which is basically a large
>> tower covered in windows:
>> http://www.technoetc.net/imgs/urbana_2011_gameplay_2.png
>> Each window will be translucent acrylic, and illuminated from behind.
>> To provide interaction, I'd like each window to be touch sensitive.
>> I'd like to use a capacitive sensing approach, but not sure if this
>> will work until I do some experiments; I fear over such a large area
>> capacitive sensing will be very noisy.
>> In the meantime, I'd love to hear any suggestions anyone might have as
>> to how to detect users touching the windows.  I'd like to avoid having
>> to use little buttons beside each window or turning each window into a
>> mechanical switch -- since there are 100+ windows, I'm looking for a
>> solution that scales reasonably well.
>> Light or IR sensors might be an option, but I imagine will require a
>> great deal of calibration.  Does anyone have any experience sensing IR
>> reflections through translucent or tinted acrylic?
>> The piece is still in the design stage, so I'd love to hear your
>> suggestions/comments.
>> Thanks in advance for your consideration and suggestions,
>> Andrew
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