Circular Leitner Box for Spaced Repetition Flashcards

A circular Leitner box: a physical tool for spaced repetition learning. The cylindrical carousel has 32 radial slots, one per day, for standard 54 × 70 mm flashcards. The matching lid has windows over the slots to review on days 1, 2, 4, 8, 16 and 32. - Rim with 32 card slots, 216 mm diameter, 83 mm tall

- Lid with the review-day windows

- Day marker peg

Printing How to use it: new cards start in compartment 1. A card you answer correctly moves to the next compartment; a wrong answer sends it back to compartment 1. Higher compartments come up less often, so you spend your time on what you have not learned yet. Customize it in your browser This model is fully parametric. Change card_width, card_height, days and the wall thicknesses (set for 0.42 mm lines and 0.28 mm layers). Open it in the free OpenSCAD Playground, change the numbers and export your own STL: Open it in OpenSCAD Playground Source The OpenSCAD source and the rest of my models are on GitHub: github.com/SinaChavoshi/3d_printer_agentic_models Designed with AI assistance in OpenSCAD.