I’ve always loved mechanical watches. Something about the incredible precision engineering behind the movements was always fascinating. However, as anyone with an automatic watch knows, its incredible frustrating to put your watch on only to notice that the time is incorrect due to the power reserve running out. After looking online and being shocked to see $100+ prices for simple one watch winders, I decided to make my own.

Powered by an Arduino nano and a Sg90 servo, this watch winder rotates 180 degrees back and forth intermittently to keep your mainspring wound up. For this project, I relied on my pre-existing CAD and coding skills to model the 3D printed components and program the Arduino. Along the way, I also learned to solder, slice my CAD models for 3D printing, as well as learned how to adapt CAD files for production.