We’ve covered a fair amount of multitouch projects by now, and here’s another great method of building your own. It’s actually far more simple than you’d think as we showed in our 5 minute, dirt cheap multitouch example a few years back. Far from Microsoft’s $12,000 Surface technology, any hobbyist can make one as demonstrated by this tutorial.
You can put together a high responsive multi-touch surface computer using the detailed steps outlined. This is one of the more expensive ($350) and labor intensive versions we’ve seen, but the results are pretty neat as you can see from the photos and video below.
The multi-touch surface computer is a homemade wood cabinet with a transparent acrylic top. The acrylic surface sandwiches infrared LEDs which creates a layer of light within the sheet. When the surface is touched, the IR light hits the spot and reflects downward into the cabinet. A modified PlayStation 3 Eye webcam with an IR sensor captures the touches as white spots and processes it using available software on a connected PC. The processed image is signaled back to the surface using a projector.
Sounds simple in theory, but it took the team about two weeks to put it together.