The following pictures(sorry about the quality) are my newest version of the LED pen device, in the picture i have about 6-7 LED's attached but you on...
This is my first Instructable so please be nice. This is how to make a multi-touch interface out of you desk for very little money. Finally got a video uploaded,sorry about the bad frame-rate my laptop isnt all that good.
Step 1: Necesary objects
For this you will need a Webcam, a Glass Desk, software called roboRealm ( RoboRealm download ). For me i mounted my webcam under my desk with ducktape.