How To Make a cheap multitouch pad like in the Macbook Air
Electronics • Hacks, Mods & Circuitry
Multitouch Mini (MTmini) is a cheap multitouch pad.
You need:
-Cardboard Box
-Piece of Clear Flat Sturdy Material (ie. Glass, acrylic, plexiglas)
-Paper (ie. printer paper, tracing paper, almost any paper)
-Webcam or Video Camera (I use a Philips SPC900NC)
-Computer (dual core recommended, but not needed)
-Optional Picture Frame
Total Cost: $5 - $50
-Finger Tracking Software-
Touchlib: http://nuigroup.com/touchlib
Set touchlib to use front illumination xml file.
-Windows Mousedriver: http://nuigroup.com/touchlib
Smoke Demo: http://nuigroup.com/touchlib
MultiKey Application: http://ssandler.wordpress.com/my-soft...
For this to work, all you need is a room with (at least) some light. The results will be best when the room lighting is even (no bright lights shinning from one direction onto the multitouch pad).
When you place you fingers on the surface, shadows are created where your fingers are. The webcam sees these shadows and sends the image to the tracking software which tracks the shadows as they move around. It's really that simple!
