Thanks for all the help. Another news group has suggested I use a clock
mechanism and gearbox. This sounds simple so I think I will try this first.

Bob


"Bob" wrote in message
...
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