I've been looking at watch winders for a little while now - I'm getting to the point now where I struggle to keep my automatics running purely by means of my daily rotation.
Watch winders seem pretty pricey, even the inexpensive ones cost at least 40 quid for a single winder that can be switched between rotations in either direction, and go up from there. I'd want at least a two-watch winder (or two singles), so I'm looking at close to 100 quid for a device that basically rotates slowly for a few hours before stopping. Plus, I keep reading about winders that stop working after a few months of use.
Hence, I'm thinking about making my own watch winder.

My idea is to mount my watches on a large rotating circular holder, and mount it to a constant-velocity motor (such as from a cheap old turntable) using a belt-drive arrangement that will provide similar rotation speeds to a commercial watch winder. Because the rotation speed will be so low, the turntable motor should easily have enough torque, and turntable motors are easily and inexpensively replaced. Connect it to an automated on-off switch (such as you use to operate your lights when you're on holiday), and you basically have a uni-directional watch winder, right?