Electric motor fidget spinner
thingiverse
Get a 40mm cooling fan with a small round motor board that can run on two 2032 coin cells. Remove the fan's frame and blades. The spinner frame is designed for a fan with a 25mm motor board diameter, so make adjustments accordingly. Next, remove the stopper ring holding the fan axis under the sticker. Arrange the wires and coin cells, then solder a small 4x9mm switch to secure it in place. Use hot glue to fix the motor and switch firmly, adding a few bolts near the switch for balance. Fasten the frame halves with three 2x6mm screws. Finally, attach caps, gluing the top one securely and adjusting the hole in the bottom cap if necessary. Spinner frames print better upside down for most users.
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