[Vanhackspace] Info for next week's table

[Joe Bowser]

Hey
I'm looking at how MaximumPC did their screen, and I'm sure it's easier to
get the Sealant instead of the Sorta-Clear.  Perhaps we want to take that
route with the drafting stuff.  I'll see if I can find a source for that
today.

But yeah, it'd be cool if we could get a couple screens going if we can.
 They should be roughly 1 m in height (3.4 ft??) and 18 by 24 in width and
depth.  I'd draw plans, but I don't have a good CAD program, and I barely
remember Grade 8 Drafting.

Joe

On Thu, Apr 9, 2009 at 10:25 AM, Austin <austin at artefactual.com> wrote:

> Im doing a homedepot run this weekend I could probably pick up the
> acrylic.  Also what size mirror do we need?  I have a handful of
> halfbroken ones kicking around.
>
> -a
>
> Joe Bowser wrote:
> > Hey
> >
> > This was going to just go to Dallas, but I'd figure I'd do a call out
> > to the list to see if we can get certain materials by this Tuesday for
> > Multitouch night.
> >
> > Currently, I have the following tools to create a Multitouch Screen:
> >
> > - Projector
> > - OSFRAM SFH485P IR LEDs (About a pack of them, very bright when shot
> > with a camcorder!)
> > - Modified WebCam (Removed IR Filter, Added Chunk of Developed Film to
> > filter visible light)
> >
> > I need to get the following:
> > - Acrylic Sheet (18" by 24", available at Home Depot)
> > - Frame (Can be wood, but Aluminum apparently works better)
> > - Diffuser (Tracing Paper works fairly well, can get an 18" by 24"
> > sheet of this as well)
> > - Mirror
> >
> > Also, it'd be good to try out two techniques.  If we're going to do
> > FTIR, we need the following:
> > - Transparent Silicone Rubber (Sorta-Clear
> > 40) http://wiki.nuigroup.com/Compliant_surface
> >
> > The last time I priced this, the most expensive thing was the
> > Sorta-Clear 40, the cost breakdown should be like this:
> >
> > - WebCam ($0 to $30)
> > - Exposed Film from Urban Source ($0.25)
> > - Acrylic Sheet ($25 ~ $50)
> > - Diffuser - ($2 - Used Elastics and Tracing Paper)
> > - Mirror - ($6 crap mirror from the nearby Shoppers on Commercial Drive)
> > - Picture Frame - ($25)
> > - Wood ($40)
> >
> > I didn't buy Sorta-Clear, which is why I never released the prototype
> > (without the complaint surface, it doesn't work well).  However, by
> > using DI, we might be able to get it working more quickly (plus if
> > people put/spill beer on it, the silicone won't get all funky).
> >
> > More info is on the NUI Group Wiki: http://wiki.nuigroup.com
> >
> > If people want to help get these parts, let me know.
> >
> > Joe
> > ------------------------------------------------------------------------
> >
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