Swedish design has created a prototype of a digital clock from 24 analog alarm clocks, whose hands come together to create a digital display
of the time. There is a youTube video showing how the clock hands move http://www.youtube.com/watch?v=zbulAxkeMbo&feature=player_embedded


This clock has Red digits that appear to float in the air in front of the clock. This illusion is based on inertia of a human eye. If LED-formed digits will periodically and frequently enough flash, they will appear solid and steady. And since the matrix of digits is formed by a mechanically scanned single line of LEDs, and the fast rotating clock body is not visible, it leaves digits "suspended" in the air. The first clock using this concept was built by Bob Blick.





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