Cool project idea: Switchable Magnet

Shoudn’t be too tough to recreate something similar with stacked PG ply.


A bit more how and why it works might be interesting as well as extraneous magnetic fields the could mess with a motor as we have seen with our head fans. I had not thought much before about how strong magnetic fields might act beyond what they did to your credit cards that got within range.

When we were building the fixed magnet MRI there were a few folk that mindlessly walked inside the shielding with their wallet in their pocket and in an instant had to get all new credit cards. Even with the magnet like that set to “Off” the fields would still be amazing but only cancelling each other out (mostly) at the point of contact at the bottom.

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