Counter with Auto-rollover

thingiverse

The normals of mtg-star were flipped outwards correctly. This should print accurately now. I've also created a more refined version of mtg-number2.stl with cleaner geometry (and significantly tighter tolerances, since 3D printers have advanced much further than when I first published this) I've updated the number wheel with Vano7750/Ivan Sitas' solution for improved overflow handling. Simply use mtg-number-V2.stl instead of mtg-number.stl Here's a video showing it in action The ten's digit automatically rolls over due to an embedded geneva wheel, courtesy of jessed. (Parameterized gears by LeemonBaird.) (yay public domain!) Originally, this was intended as a life counter for Magic: the Gathering. It's designed to fit perfectly into the lower half of an MtG card. Depending on your printer's tolerances, you may want to scale it up. If your printer is well-calibrated, you should be able to assemble it with minimal sanding even at 80% scale. How to print Simply print all STLs except spring.stl and mtg-number.stl. The spring part makes the wheel snap more securely, but makes the whole thing harder to turn. Print it if needed or preferred. You'll need some superglue to attach the ten's digit plate to its base. It's designed with a very loose fit, allowing gluing in the right orientation. The mechanism was designed in OpenScad by my flatmate, and the enclosure was created in blender.