Top mounted gear motor drive for Rolling Ball Clock
I added stl files to Printables. Clock has been functioning without any problems or issues for a week.
Low profile, I run a 1rpm 12 vdc gear motor contuniously from wall wart power supply. It is silent and runs cool. At first I ran it from a 12v 3000mah battery, I didn't charge or keep track of how long it ran off of battery but it opperated for quite some time.
https://www.printables.com/model/1827761-top-drive-for-daves-rolling-ball-clock
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Created stl in printables if anyone wants to give it a try.
https://www.printables.com/model/1827819-rolling-ball-clock-base-mounted-gearmotor