Yeah    connect a stepper to a salvaged analog mechanical clock and make it=
 run both ways

>=20
> On May 20, 2013, at 3:29 PM, IVP wrote:
>=20
>> How about spinning a row of LEDs and printing messages /
>> patterns in the air ?
>=20
> Possibly. Depending on the PSU, these steppers are probably
> good for 5 revs/sec. Might be fast enough
>=20
> 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
>=20
> Joe
> --=20
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>=20
>=20

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