Ball-powered pendulum timer
by shiura · from Printables
Personal use only
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↓ 110 downloads
Gadgets
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PLA from £6 inc. UK delivery on letter-sized prints. We slice, print on a calibrated Creality K2 / Bambu A1, QC and post.
Duration of this timer can be set by the number of steel balls, 30 seconds per ball. Only the last ball rings the…
