I got everything in the mail today and I’ve been busy! The projector I picked up on eBay for $155 works great!
A little woodwork this morning yeilded a nice table by lunch time. This afternoon I’ve been soldering up the LED rails and installing them on the acrylic. I sealed them with aluminized silicone. Nice stuff. Blends with the aluminum nicely. A little blue masking tape on the acrylic does the trick to keep everything neat while you smooth out the bead. Just peel up the tape soon after and you get nice clean sealed edge.
It’s 8:24 pm. I just got done with the first test of the table. As you can see in the pic, I have more IR light than I really need. In fact, it spills over a bit too much. I may have to do something about that.
As far as blobs go, I got plenty! No problem!
Right now my setup is just .250” acrylic with drafting vellum .060” beneath it. Yes there is about a 1/16” air gap and I still have massive blobs, even with a 1/300 second shutter speed. Nothing but acrylic on top.
My first challenge will be in getting the image clean and proportional. I have a lot of “keystoning” and no way to deal with it other than physical placement of the projector and mirror. The bottom of the image area is smaller than the top. I’ll work it out. I should have bought a projector with a keystone adjustment! Oh well, I got a great deal on this one and it has plenty of lamp life left. Oh yeah, I need a piece of optical mirror as well. Because of the steep angle of reflection, I get a prism like effect on images with a conventional mirror.
I ran the TouchLib calibration, but it’s buggy on my laptop. When I run the smoke demo, my touch points are not aligned with my fingertips. I noticed that I no longer get the dialogue box that allows me to adjust the capture size etc. What’s up with that?? I need to download the latest calibration files and run the MT from my dual core machine.