Rotational switch
thingiverse
I build this switch for an model engine ignition. The shaft is designed for a skateboard bearing. For the shaft you need a 5x5x5mm neodymium magnet ,two 4.5mm bbs as counterweight and an m3 hex screw. For the switch I used a raizorbalde, and a strong neodymium magnet and some copper wire. I glued everything in place with some jb weld.
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