This is the second version of the fully-functional mechanical countdown timer meant for board games.Now with an extra gear stage to count up to 4 minutes!It's fully 3D printed, except for the axles, which can be salvaged from an old inkjet printer, a handful of screws and some coins or washers for weight.The machine features a print-in-place ratchet mechanism to load the weight arm in increments of 1 minute. The energy is transferred to the deadbeat escapement wheel via a gear train.It includes a comprehensive 23-page building guide with lots of pictures!
STL (Stereolithography, filesize: 65.2 MB), 3MF (3D Manufacturing File, filesize: 8.32 MB), PDF (PDF, filesize: 3.24 MB), STP (STEP, filesize: 1.31 MB), OTHER (Other, filesize: 59.8 MB)