[Lab] Touch sensitive/reactive windows

Jean-Marc LeBlanc jeanmarc.leblanc at gmail.com
Mon Mar 14 13:20:11 EDT 2011

Depending on how much you want to spend, you can all ways use some
thing like this in front of all your windows

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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