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Show HN: 32V TENS device from built from scratch under $100

littlemountainman.github.io
70 points·by autonomydriver·8 bulan yang lalu·25 comments

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autonomydriver
·8 bulan yang lalu·discuss
Poor wording, should mean that each finger has a dedicated output, but you are right, they are all tied together
autonomydriver
·8 bulan yang lalu·discuss
In my searches, yes, I found something like that from an italian university. Sadly can't find the paper now.
autonomydriver
·8 bulan yang lalu·discuss
Coming in a V2, semester just started again, so I have a little less time for it. Given that I also have some other projects on the way :)
autonomydriver
·8 bulan yang lalu·discuss
The two BJTs do limit current to 20mA on all finger outputs. Voltage feedback is also set up to ensure maximum 32V. MCU protection, well just a ferrite bead.