Researcher provides another Wii Remote hack, this time to help business users create interactive whiteboards on the cheap.

You might remember the incredible Wiimote hacks by by Johnny Chung Lee, who gave us head tracking demo for desktop VR displays. Lee, a PhD student in the Human-Computer Interaction Institute at Carnegie Mellon University is back with some more useful Wiimote hacks, this time to turn any surface into an interactive whiteboard. He shows how to turn a wall into a whiteboard with a DIY LED pen interface, and also how to create a multi-touch desktop or laptop LCD display using 2 LED pens. These are incredibly useful ideas for creating inexpensive interactive displays.

Using an LED array and some reflective tape, you can use the infrared camera in the Wii remote to track objects, like your fingers, in 2D space. This lets you interact with your computer simply by waving your hands in the air similar to the interaction seen in the movie "Minority Report". The Wiimote can track upto 4 points simultaneously. The multipoint grid software is a custom C# DirectX program.