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| Created | May 02, 2012 |
| Last modified | May 02, 2012 |
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Hi tontoa4! I'm trying to make the Transcranial Direct Current Stimulation Device also, and I was wondering if you found a solution for the damn fuse? It's so expensive, but then again, very important :) Thanks! |
October 02, 2012 |
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Ended up using a double failsafe. Not sure yet if the final device will have a fuse or not. Try something called a crowbar circuit. Essentially you use a transistor that switches flow direction when it's energized. So you resist the input current to the transistor to a level where its off (taking power from the current going through the skull) Then if the current going through the skull manages to go to 3mA or 4mA the transistor wakes up and says hey, I'm energized! And then switches over and faults to ground. You can do this setup pretty inexpensively. Probably under a few dollars. But it's not as perceived as safe in my mind to the god ol' fashioned fuse, even though in most cases it can be just as safe. But with a fuse, there's someone to sue if it fails, other than you. |
October 04, 2012 |
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