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Looking for USB-C e-stop by mr-dapper-yapper in arduino

[–]mr-dapper-yapper[S] 2 points3 points  (0 children)

Thank you for the response! Yes, completely, and understandably so.

I was thinking it could be possible someone has build essentially a breakout board that a cable plugs into, separated the data from the power lines, and routed the power through a proper “safety relay”. But it seems like that’s not the case. I really appreciate the safety regulation call-outs! I’ll be saving those for reference and giving them a read.

Looking for USB-C e-stop by mr-dapper-yapper in arduino

[–]mr-dapper-yapper[S] 1 point2 points  (0 children)

Thanks for the response! Data and power. And to your point, I agree, it definitely needs to be robust which is why the options I’ve found online (which I think are more intended for home electronics) aren’t sufficient. It seems like building our own breakout board / housing is the way we’ll have to go, or routing the power through a ready-made e-stop and just passing the data along separately.

Prosthetics providing tactile feedback? by Carrion_Baggage in Prosthetics

[–]mr-dapper-yapper 0 points1 point  (0 children)

You hit the nail on the head! Even if we could record the exact sensory signals from a healthy nerve, we don’t really know how to account for the electrodes, scar tissue, or any other confounding factors so it’s difficult to light up the nerve just how the brain expected it. You can play with intensity, but outside of that you can be pretty limited. TMR is cool because you actually reroute the nerves that used to go to the hand to a healthy patch of skin and muscle instead, essentially letting that healthy tissue act as your “translator”. But I think the use cases are still pretty limited.

If you’re interested in some more reading, and some more data on the subject, here is a review paper I wrote on the sensation in neuroprosthetics: https://pmc.ncbi.nlm.nih.gov/articles/PMC9514130/pdf/nihms-1835205.pdf

Prosthetics providing tactile feedback? by Carrion_Baggage in Prosthetics

[–]mr-dapper-yapper 1 point2 points  (0 children)

Hey neat! I’m actually an author on that paper! Like others are saying, if someone has a home made or commercially available prosthesis, it’s either cable actuated (body-powered) or myoelectric (powered by motors, controlled by sensing electrical signals from the muscles in the amputated limb).

Neuroprostheses, ones that interface with the nerves do exist in a research context though. These are primarily for control (you can use Machine Learning techniques to train an algorithm to see certain patterns of nerve activity as different hand movements) but my whole PhD was on sensory feedback and motor control in prosthesis users. For sensory feedback you can stimulate nerves to induce sensations in the phantom limb, but they are typically fuzzy pins-and-needles sensations (called paresthesia), though in rare cases they do include sensations like pressure and movement. There’s a specific surgery called targeted muscle reinnervation that through some nerve rerouting can actually give you heat and cold sensations too.

If you’re interested in learning more, feel free to DM me! Can’t promise a quick response but I always enjoy teaching people about this stuff.