Years ago I came across a wooden perpetual calendar and I loved the idea.
After thinking about it for months I decided I wanted to make one myself; however, there was a long list of things I wanted to do to improve on the idea. The most important change I wanted to make, is to automate the rings. I know me, and based on current wall calendars not showing the correct month for some time, if a daily change is necessary it would likely only be accurate a small percentage of the year.
Combining microcontrollers, 3D printing, woodworking, and laser jet image transfer, this project will have something for everyone to learn.