JakeStew
JakeStew
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Just to tie things together (maybe a merge is in order)...http://openbci.com/forum/index.php?p=/discussion/365/adding-wifi I found a ESP8266 SoC WiFi chip that can be had ready to go on boards with built-in antennas and antenna jacks for around…
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> To me, the question is whether you can get enough LEDs together to be a bright enough or physically large enough visual stimulation to evoke SSVEP. You can get really powerful LEDs nowdays. Easily powerful enough to temporarily blind you, an…
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Looks like you guys are doing great work and really have the ball rolling! A couple comments... I think a little more investigation into the metrics of one-size-fits-all or maybe 2-3 standard sizes. Perhaps it would be good to define what sort o…
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Anyone know of a way to convert them to Eagle/KiCad/DipTrace? I usually use Eagle and I hear a lot of good things about Diptrace. KiCad would be a good choice to support also since it's open source. Nothing against Design Spark, but it's kinda l…
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I think you must mean EKG?
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Those electrodes look pretty nice. The electrodes are cheap (15 for $10), but the lead wires are expensive (~$8 each). Anybody have a source for the clips? Maybe FRI would do a DIY lead kit?
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Although it doesn't directly apply to my research I am interested doing some EEG work for fun. Pulse just seems like something really easy and fun to add. There are quite a number of pulse sensor boards on ebay for $1-4, so it seems a worthwhile f…
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The pulse sensor is only using light, so I would guess there would be no major problems with using pulse sensor on one side of the ear clip and electrode on the other. They would be on two different circuits, not even sharing the same ground.AgCl i…
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I actually just plugged them both in and verified that there's no latency setting. 16ms would be a huge gap in the data stream at higher data rates, and I've never seen that before with them. I can probably do some more testing if needed. I'm ju…
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Has anyone tried making their own silver electrodes? Silver is a bitch to plate, but luckily it's cheap!Chloriding the silver is easy enough.
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Any thoughts of adding pulse sensing to OpenBCI?Seems like it would be pretty easy to add the sensor to the earclip.
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I just checked and my CH340 and PL-2303 devices don't seem to have this problem.It will probably be easier to switch to better components than trying to hack the driver. IME settings like this are often there as hacks to cover up defects in the har…
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Good info. The regulator might be something to tweak for the future.In most of the electronics I'm familiar with it's common to use a 2S lipo and a buck regulator to get a 5v line. Maybe one of the best things to use would be an external cell p…
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Why not just use a proper 2S+ battery? They're cheap and easy to come by. Adding switching boost regulators seems like an additional, unnecessary complication. I'm kinda surprised that you're not seeing any noise problems from it. Have you chec…
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Forget the DAQ. There is no point in using one on serial data. They are for acquiring multiple channels of digital data. You already have acquired and digitized the data into a single serial stream.
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I guess what I meant to say is that someone with access to a "LabView Application Builder" license can now more easily produce stand-alone programs that we could all use. It's a quick route to a polished application interface with powerful signal …
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Thanks for the link. I'll probably take a stab or two at etching them and if that doesn't work out well enough then I'll order some boards from Oshpark or another board house. If I go that route I'll post up the board files for input and see if a…
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Great news to hear LabView support is in the works. There's a few LabView based EEG packages out there. The name escapes me at the moment, but there was a pretty popular commercial program that used it. Does LabView still support building applic…
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I'm thinking of whipping up a design similar to peabody's. I'll probably go a fair bit more simply. I have plenty of STM32 dev boards, one or two ADS1298's, and a couple serial-> BT dongles kicking around. So I'll probably throw the ADS1298 a…
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Good points. It certainly makes sense to take precautions against foreseeable potential risk like this. But it's also good to make sure you are honest about the reality of the situation lest it sabotage our credibility. A bit of googling hasn'…
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Great link that looks like a wonderful product! Reasonably priced too! http://hifimediy.com/image/cache/201307191039-800x800.jpg I don't see much in the way of filtering on the device side though. Looks like a switchmode power supply throug…
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The law books are full of regulations against problems that don't exist. I'm not saying that's necessarily the case... but I'm a skeptic, I don't believe in things without a basis in fact. It would be great to find out what the risk is, or if it …
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I think for noise reasons wireless is required. I'll look into what sort of data rates I can get out of the several $7 serial BT dongles I have kicking around. I can't imagine not being able to get at least 500kbps. A lot of the literature in th…
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I take it that the RFduino stack is closed source and user code is running in a VM? This seems like this should be a fairly easy to deal with issue, if the source were available. I can't believe that they're so fraudulently misrepresenting the…
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I've been through a few discussions on isolation before. Avoiding noise is a plenty good reason reason by itself. I just don't see any legal liability issues. If the product is not used according to instructions you're not liable. There's nothi…
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> remember that any hard-wired link (SPI, I2C, UART, USB) have a safety risk to the user. There's a couple issues I have with this. The primary argument is that users may choose any sort of wireless link they want. None of those interfaces ne…
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Thanks for the link and info!My application is spatial filtering of SEMG arrays for a wavelet decomposition application. So unfortunately I need a lot of high resolution, high sample rate channels. 8 channels would be enough to get a little furthe…
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The forum lost my damn post! Anyways, looks like at higher sample rates you can get 2000 sps for about the cost of one bit. That would be something to shoot for. > The HC-05 serial bluetooth 2.0 module is capable of 1382400 baud, It's …
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Your points are well made. My intended research application and bent towards tinkering for performance certainly influences my opinion on the matter. I should further point out that I have no practical experience with these boards. My last hardwa…
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> the reason for getting an 8-bit board is Arduino compatibility. OpenBCI is not Arduino compatible. It uses a different form factor. Personally, I don't see any advantage to limiting yourself to a specific form factor and specific "names…