[dorkbotsea-blabber] LED coffee table

William Beaty billb at eskimo.com
Sun Oct 7 20:50:25 EDT 2007

Ah, they come close to one of my unbuilt devices proposed for Seatac
airport coffee shop:  I'd use LEDs as photosensors AND as light sources at
the same time, then build several small coffeeshop tables with LEDs below
thick epoxy.  But don't use the sensors to light their own LEDs.  Instead
scan the sensor data and transmit it to a different table, so any shadows
on Table One will create patterns on Table Two and vice versa.  (And then
use WAY more LEDS than Evil Madsci Labs, like a hex array with 1cm spacing
or even denser.)  People at different tables would start playing with each
other: if you put your hand upon a hand-shadow appearing on your table,
the people at the other table see a hand-shadow appear and move to their
hand.  Essentially there are other people down inside your table, moving
forks and hands and coffee mug shadows around.  A small bit of computer
power would recognize unused tables, and instead connect only the occupied
tables together.  The cost would be quite low if $0.01 LEDs were used, but
no thirty cent photodiodes were needed.

On Sun, 7 Oct 2007, shelly at hive-mind.com wrote:
> ok, this is cool:
> http://youtube.com/watch?v=IkmpIXd9Q90&feature=bz301
> Anyone familiar with this group,
> http://www.evilmadscientist.com/article.php/tablekits  Evil Mad Scientist
> Laboratories?
> Shelly

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William J. Beaty                            SCIENCE HOBBYIST website
billb at amasci com                         http://amasci.com
EE/programmer/sci-exhibits   amateur science, hobby projects, sci fair
Seattle, WA  425-222-5066    unusual phenomena, tesla coils, weird sci

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