How to use drivers to control gears in Blender [3.1] [REQUESTED]

[@vizdotlife]

This worked great in Blender 4.1! Thank you.

[@JSAbbott]

You're welcome!

[@marklegcs]

Thanks

[@JSAbbott]

Welcome

[@Shka_maru]

Thank you for this. Could you show us how to do this with a bone controller (preferably by making a 2d UI with a slider the controls the rotation)? Please

[@JSAbbott]

Welcome.
I've already done a video on using bones as controllers that should help you (ruclips.net/video/WmSqO4RbHaI/видео.html).