I have a project that requires turning a plastic disc (about the same size
as a CD) through 360 degrees in 7 days or 24 hours using a battery powered
system of some sort. The smaller and cheaper the better! Can anyone suggest
the best way I should approach this problem?

Thanks

Bob

On Wed, 16 Nov 2005 12:21:55 +0000 (UTC), "Bob"
wrote:

I have a project that requires turning a plastic disc (about the same size
as a CD) through 360 degrees in 7 days or 24 hours using a battery powered
system of some sort. The smaller and cheaper the better! Can anyone suggest
the best way I should approach this problem?

Thanks

Bob


Sounds interesting, what is your application?

I agree with the other responders a stepper with a timer and some
driving logic to turn the disk . . . assuming the torque is sufficient
for your task.
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On Wed, 16 Nov 2005 12:21:55 +0000, Bob wrote:

I have a project that requires turning a plastic disc (about the same size
as a CD) through 360 degrees in 7 days or 24 hours using a battery powered
system of some sort. The smaller and cheaper the better! Can anyone suggest
the best way I should approach this problem?

Thanks

Bob

Buy a clock and take the cover glass and the hands off, and drill a hole
in your disk that fits on the hour hand boss. Guess you'd need a 24-hour
clock.

Or, if you need 7 days, a mechanical irrigation timer.

Have Fun!
Rich