Login / Register

Perpetual Flip Calendar

Thanks! Share it with your friends!


You disliked this video. Thanks for the feedback!

Sorry, only registred users can create playlists.

Channel: Measured Workshop
Categories: Fine Arts   |   Crafts   |   Science   |   Technology  
 Find Related Videos  added


Perpetual flip calendars have been around for a while. They seem operate very simply, but I could not for the life of me figure out how! After some digging, I found two US patents as really good references of how this mechanism works:

It was a little math problem figuring out how to evenly represent 1 through 31 using three different types of wooden tiles. I wanted to do this to be able to see how the tiles flowed through the calendar.

I probably should have made both sides of the calendar with the acrylic windows just to make it look move balanced and symmetrical, but I wanted a "how does this work" side and a "this is how it works" side.

I didn't show it here, but you can count downward if you flip the calendar the opposite way. You can also "reprogram" the calendar to flip the opposite way if you wanted to turn it towards yourself to iterate.

If you have a 3D printer, there are free plans to print one of these for yourself:

► Enable closed captions for commentary

► GIF image gallery of the build here:



Post your comment


Be the first to comment