Jeff Han, in the NYU Department of Computer Science has a wonderfully enticing
video of a
multiple-touch sensor built using the
bidirectional capabilities of an array of LEDs. The video is enchanting and worth repeated viewing. The mind boggles at the possibilities. Tragically the minimalist presentation leaves us wondering as to many of the practical aspects of constructing the array. Casual observation shows it is composed of 256 individual sensing elements.
This
technical report by
Paul Dietz,
Darren Leigh and
William Yerazunis of
Mitsubishi Electric Research Labs offers all the practical knowledge one needs to actually construct something like this. What I wouldn't give for some time to play with such things.
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