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Smart board Using distance meters.

Hello! My name is Muneer. I was wondering whether this concept of making a smart board would work(shown in image). The idea is to use two distance meters to measure distance ‘a’ and distance ‘b’ from the transmitter in the pen to the top corners. Distance c is fixed and known. Using the distances, the x and y distance should be workable from the formulas(shown in image) I guess. I have a few concerns and require your expert opinion, a. How can we construct the distance meter (IR? Ultrasonic? Any available schematic...etc) b. Converting the x and y distances to pixel information c. Interfacing the board to a computer, possibly giving the input from the smart board directly as a mouse input. or if you could suggest other practical ways. Could you please help me with this? Thanks.

Picture of Smart board Using distance meters.
LinuxH4x0r8 years ago
Yes, this would definitely work. Because its infrared it might not be 100% accurate, but it should work.
muneersn (author)  LinuxH4x0r8 years ago
thanks for the reply buddy. Do you know of any instructable or such to build something like this.
None that I can think of, but http://hackaday.com/ might help.
Good luck!
caitlinsdad8 years ago
You can search on touchscreens. One is https://www.instructables.com/id/Back-projection-56-inch-multitouch-television./. For a big board I guess using your finger would be better than a stylus or object in your hand. And you wouldn't need an extra component. Good luck.