rdb
Comments
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It's probably best to just get precoated magnets, I imagine that it's not easy getting the coating right (no air bubbles etc) when doing it yourself. I don't have any experience with them, but it seems that VP Scientific has a whole range of relatively cheap neodymium magnets of all sorts and coatings. I've only ever…
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I assume that's just the array, you'd still need to develop and manufacture microcircuitry that sends the appropriate signals to the array. The way to go is probably a private surgeon, but that's going to cost.
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Cool, I've myself been planning to start a small store targeting biohackers for the past year or so now. If you plan on selling cylindrical magnets, it might be useful to sell RFID injectors as well. You can get them rather cheaply in bulk, sterile packed, from Chinese suppliers.
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Remember that the arduino doesn't have any isolation features whatsoever. Using it for tDCS or any biopotential measurement including EEG could be deadly if proper precautions aren't taken. I did once consider the idea of designing an arduino clone that does have full isolation and programmable gain amplifiers onboard for…
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Oh, I wasn't familiar with the updated Arduino design. You're right, the Uno does have an LM358, but one channel is already in use as voltage comparator (presumably to short-circuit the 3.3v regulator depending on the input voltage) and the other has its inputs tied to GND. It's not intended (or possible) for you to use it…
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It seems a bit silly to me. If you're going to have a device attached to your finger that is supposed to translate sensor readings into vibrations, then why not vibrate the skin directly using a vibration motor or something like that? That completely eliminates the need for the magnetic implant, which comes with obvious…
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Arduinos don't have an op-amp, so you'd still need the LM357/358. Aside from that, sure, you could use an arduino, it's just a bit overkill. Just make sure that you power it from a battery and that you unplug the USB cable, it is really important that there is absolutely no electrical connection between the tDCS and…
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It's been suggested to use another magnet to gently pull out your magnet once you've sliced it open.
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I have changed a few minor things in the meantime. I am still interested in continuing with it, but due to various circumstances, I barely have any time to work on it. EDIT: I thought I had posted this before, but apparently I haven't; a slightly more organised schematic is available here.
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I suppose that would work with any laptop that has a hall effect sensor to detect whether the lid is closed.
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That's because the magnets react to magnetic fields, not to electrical fields. Wires do not emit a very strong magnetic field. Coils do, and appliances are typically filled with them - particularly in the transformer.
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There's no timeframe, sorry. We're currently in the process of evaluating the TMS37157, a chip from TI which comes in a 4x4 mm footprint package, can power itself over LF and has bidirectional data transfer over the same line, and has a built-in battery charge controller. It can easily be hooked up to an microcontroller…
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Something like that, but it will include a wireless powering/charging circuit, bidirectional data transfer and tiny battery charging system. It will of course be more limited in terms of power use, but it'll be a starting point that people can base their designs off.
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As far as I know, most of the electronics-based projects floating around aren't anywhere near implant-ready. Most of the things people have been working on are in prototype stages and have not been effectively scaled down to implantable size yet. ThomasEgi and I have been working on a generic and tiny implant core that…
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So they can toss out the ones with defects, and it's good to have spares ready, in case they slips out of your tweezers during operation and stuff like that.
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One generation of magnets used gold coating, followed by a silicone coating. The silicone coating is essential, the gold coating is just for some temporary protection when the silicone coating is breached, until the magnet is removed.
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The server address for IRC is chat.freenode.net, that's their main server rotation. (irc.freenode.net may still work, but the recommended domain is chat.freenode.net.)webchat.freenode.net is simply a website hosting an online IRC client.
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Perhaps you could have a magnet in your hand and coils in your mousepad that track the relative position of the magnet to the mousepad. If that would work, that would greatly simplify the design on the implant end.
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The magnet they use is really heavy-duty, especially compared to the tiny weak ones that are used for implanting. They also have the magnet sliding inside the coil. I really doubt you'll get anything out of this approach, though it's easy enough to try out and get the actual numbers. For now, the approach that has the…
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It doesn't sound feasible to me to use such a high frequency technology like bluetooth in an implant, so I'm curious as to how you've overcome the hurdles. The modules are relatively big (certainly over a centimetre in width and height) and require large amounts of power- transmitting for a few minutes or having the…
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Welcome to the community! Just don't go and steal my lab walrus. Transdermals are possible, there's just a higher risk of rejection and such. Steve Haworth regularly does (non-electronic) transdermal modifications, though. As for other implant ideas, something I've been thinking about is a wireless cryptographic key to…
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I would add that even proving that someone has what is generally considered a mental illness doesn't say anything about the validity of his argument.
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Sure, but PTFE and medical grade silicone have been used for many years in implants without risk of degradation, so as long as the coating is done properly, it doesn't matter if what's in it is pure poison. Whether it's the lead in solder or just some PVC wire isolation, as soon as the coating breaches, then you're at risk…
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Even if you could produce a ferritic or martensitic stainless steel with good biocompatibility that retains its magnetism over a long period of time, the magnetic field produced would be very weak compared to commonly used materials such as neodymium or alnico, to the point where you wouldn't feel much at all if you…
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Most of my experience regarding electronics design comes from before I took any university courses on the subject, but I will say that the university courses do help a lot with building up a more fundamental knowledge, and will enable you to work out the math behind your filter designs etc. It's important, although I agree…
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You can feel your feet against the floor when you pay attention to it, but it doesn't bother you when you're focusing on writing. You can feel your heart beat when you pay attention to it, but it doesn't keep you awake. The brain is good at filtering out stimuli that aren't relevant to what you're focused on. It's probably…
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There should probably also be a wiki page outlining the different types of magnets (neodymium/alnico, disk/cylindrical) and sizes, with comparisons. Maybe I'll find some time to work on that.
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For the record, it isn't as much a new sense as it is an extension to your tactile sense. Your brain already knows how to feel vibrations in your finger, it's just likely that the section of your brain dedicated to feeling these vibrations will expand as you're using your new abilities more often. I can't imagine it being…
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There exist such materials, but they are typically very brittle. Magnets should be encased with plastic or silicone before implanting, that significantly reduces the risk of shattering.
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Also, @SovereignBleak , I'm curious about how much mL of xylocaine you injected, and what concentration it was (2%?), and how deep you injected it..