> How about spinning a row of LEDs and printing messages /
> patterns in the air ?

Possibly. Depending on the PSU, these steppers are probably
good for 5 revs/sec. Might be fast enough

I did have the thought the other day of using an air transformer
to couple power to a circuit on a PC fan, which cuts down on the
engineering to make a propellor clock

Joe
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.