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z_zetetic_z

If you want something you can actually buy, check out the wooting he

https://next.wooting.io/wooting-60he

You can set per key actuation points, and bind multiple different inputs to the same key but different depths, etc.

Great review here

https://m.youtube.com/watch?v=glQNEbh79xg

You can even mod it into another case for the DIY crowd.

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I used it for a midi keyboard and it was fun

Cool, I've dabbled in this with ordinary mechanical switches. What's the hardware interface like for the Wooting switches?

I believe it's custom, because the mechanical part is actually just part of a sensor (it's just a magnet in a slider). The other part is the hall effect sensor which is soldered on the board. So, you can't drop these mechanical parts on to another board, they aren't self contained switches.

Can it detect speed or force? I googled, and it seems to be a binary sensor.

I believe it measures distance, so possibly speed as well, and force could be computed with knowledge of spring resistance. However, I don't think I saw anything in their material relating to these two terms.

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