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.
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.
Step 2: The Software and Setup
For this step we will be setting up the software to read and interpret the image. You can download this software from there website www.roborealm.com. iI have not perfected the software for using fingers,kinda hard to seperate them,but..., I do have a pen like thing that I built from random things lying around my room that powers up an LED. The file Pen.robo is for using the LED pen thingy,u can use anything that powers up an LED and for added precision you can put an IR filter over the camera that is made from either a floppy disk drive or a completely dark spot from a negative on camera filem strip, And the file Touch.robo is for using hands but is not perfected.