Autowinding mechanical watches are wonderful, they stay wound simply by wearing them. But what happens when you don’t wear it for a couple of days? It runs out of power as the mainspring fully unwinds. This means you need to re-set the time (and possibly the day/date) before wearing it again. But no more! This project is a watch winder to keep the auto-winder automatically wound!

This is accomplished using a small DC motor powered by a Circuit Playground Express and a Crickit board all programmed visually with MakeCode. Your watch will turn the proper number of times each day to keep it wound just the right amount. It uses a LEGO-compatible brick structure to gear it and support the whole contraption.

Check out the full guide!