Multitouch builds are all the rage now, so it’s not surprising someone would come up with a multi-touchless interface sooner or later. [Hanspeter] did just that; his Multi-touchless ribbon controller, a.k.a. Polymagnetophonic Theremin is multi-touch without the touch.
[Hanspeter]‘s touchless ribbon controller uses an array of 24 Hall effect sensors that activate whenever a magnet mounted on a thimble … Read the rest
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