Make your own multitouch projected table

Feb 28, 2007
3

Multitouch, it's all you bloody hear about these days.  If another person stops me in the street or blocks my car in just to shout "Apple have invented a multitouch cellphone!" into my face, I'll scream.  Okay, so a huge company spent over two years developing a compact screen that could respond to more than one finger jabbing at it.  So what?  What's far more impressive to my mind is this four-day project to make a multitouch table:

 

It all relies on the wonderfully-named Frustrated Total Internal Reflection (FTIR), whereby the path of LED light internally reflected between a sheet of acrylic and a diffuser is changed by the touch of a finger or other object placed against the top acrylic.  That's then picked up by a computer, and a projector mounted underneath the table displays the appropriate response.

Multitouch Table

I'm really tempted to make one of these myself, it looks like great fun.  I could also use it to club to death anyone who mentioned a certain Apple cellphone's innovative interface...

Multitouch Table

Multitouch Table Experiment [via MAKE]


Must Read Bits & Bytes