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I don't get the tongue idea either, any kind of device you'd put in would make it hard to talk and who wants to eat a battery? Plus the movement area is pretty tiny.

Accurate foot movements are just training I bet, just like with anything else. Arm amputees have shown again and again that it's just a matter of practice. Plus, were any of us really that proficient with a mouse when we first started? We take it for granted but we've been honing that for decades.

> trackpoint

Looking at how that one works, it's just four load cells. That would be exceedingly simple to reproduce with a microcontroller that supports HID. I might actually try to make one.




You can try some rapid prototyping with microbit and this library below that has ble hid support

https://bsiever.github.io/microbit-pxt-blehid/




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