If you teach or have to make a lot of presentations, you can make your life a lot easier with an interactive whiteboard like a Smartboard. Instead of an expensive piece of technology, though, you can DIY it with a Wiimote.
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If you aren't familiar, a Smartboard is essentially a computer projected onto a touch screen. You can touch the screen to move forward a presentation, make annotations, highlight text, or do anything else. Obviously, they're pretty expensive.
SMART interactive whiteboards allow a person to control a computer directly, simply by touching the board with a finger or pen rather than using a mouse. Interactive LCDs work the same way but since it is a TV, no projector is required. Interactive whiteboards allow a person to control a computer directly, simply by touching the board with a finger or pen rather than using a mouse. How Innovative Smart Whiteboard Technology Will Transform Your Walls. With ReMARKable whiteboard paint and eBeam SmartMarker you will not only turn any surface into a whiteboard but capture, record, stream and sync all of your notes with amazing, innovative technology.
DIYer Johnny Lee, however, realized that a Wii remote can track up to four different infrared signals at a time. So, if you were to mount a Wiimote near a projector, you could fake interacting with the screen using infrared pens. It's not the simplest project in the world—you'll need to do a bit of work to get it up and running, but it doesn't take too much specialized skill (like working with code or anything like that). All in all, it's definitely worth the time if you do a lot of presentations in the office. Check out the video to see a demonstration, and hit the link for instructions on how to set it up.
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Johnny Chung Lee - Projects - Wii [via MakeUseOf]