Spinning LED block has been done. Back in the mid eighties. 6" cube
in a vaccum jar (friction and noise from the spinning cube were lower
in a vaccum).
If I recall correctly they were visualizing cardiac activation
patterns.

Roman Black wrote:
>
> Olin Lathrop wrote:
> >
> > There's a new advertising product out now that spins a vertical line of LEDs
> > on a vertical axis.  It has a PIC on the rotating board that does all the
> > LED timing to create the pixels, and it also does the font generation.  You
> > can send messages for it to display via a serial port.

Look for 'virtual clock' for an existing clock product that
does basically the same thing. "Seen on TV" stores have had it
for the $150C range. Looked pretty cool even though it flickered
a bit. Had about 25 ways to show the time, including text.


> Hi Olin, I once saw a design for a 3D display,
> they had a vertical clear plastic panel, rotated
> vertically, then projected a scanned laser onto
> it from the side. It could generate a complete
> 3D shape, viewable from all directions. The thing
> I liked was that it could generate a shape with the
> dimensions quite correct, which looked very handy
> for CAD model display.
>
> Haven't seen much about it since. Maybe this could
> be done in a lower-res form by using a spinning
> panel of leds?? That would look very clever.
> -Roman
>
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