[HN Gopher] Low-cost shield ardEEG to measure EEG with Arduino U...
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Low-cost shield ardEEG to measure EEG with Arduino Uno R4 WiFi
Author : ron_87
Score : 63 points
Date : 2024-05-24 12:00 UTC (11 hours ago)
(HTM) web link (www.preprints.org)
(TXT) w3m dump (www.preprints.org)
| jdblair wrote:
| GitHub repo: https://github.com/Ildaron/ardEEG
|
| Available for purchase: https://pieeg.com/ardeeg/
| logtempo wrote:
| Thanks, I was wondering how much low-cost is low-cost.
|
| For comparison:
|
| - 240$: https://duino4projects.com/open-source-multi-channel-
| eegecge...
|
| - 500$ https://www.crowdsupply.com/starcat/hackeeg
|
| - 1K$ https://shop.openbci.com/products/cyton-biosensing-
| board-8-c...
| neurotech1 wrote:
| This is going back a few years, but we used on our systems,
| AD620 In-Amp (Instrumentation Op-Amp) front-end IC, and a PIC
| 16F series micro, some filtering in between, for 2 channels.
| Even today, I think one could get to 2 or 4 channels with wet
| saline solution, with a low BOM (Board-of-Materials) cost.
|
| I used to repair EEG systems, and work as an EEG tech.
| myth_drannon wrote:
| - 160$ BiTalino https://www.pluxbiosignals.com/collections/bi
| talino/products...
| ron_87 wrote:
| looks interesting
| ron_87 wrote:
| ardEEG cost 240$ https://pieeg.com/ardeeg/ also need take in
| mind amount of measurement channels
| Aurornis wrote:
| $239: The entire TI evaluation kit for the ADS1299 chip used
| in these projects:
| https://www.digikey.com/en/products/detail/texas-
| instruments...
|
| The above kit can be connected to an Arduino, of course. Or a
| Raspberry Pi, or your computer via the included USB board, or
| any other device you have in mind. You don't need to buy a
| specific board for your target device as long as you can
| connect the interface pins together.
|
| I strongly recommend that anyone looking to use an ADS1299
| EEG simply purchase the EVM from TI and use that instead.
| It's professionally designed and tested by the company that
| made the chip, and it's the same price or cheaper as these
| alternate boards.
| resource_waste wrote:
| I'm really excited for Latin America to develop their medical
| industry.
|
| They don't have the legacy of corruption that US medical has.
| This means they are open to new techniques, have lower barriers
| to care, and ofc lower cost.
|
| Given how many times US doctors are incorrect and are treated
| with multi-thousand dollar procedures... I have a fantasy of
| visiting multiple Latin American doctors, giving them my test
| results, and seeing what they think.
|
| Or maybe AI will solve this entirely, and I only need to go to
| Latin America for things like surgery or pharma.
|
| Whatever the case, I'm entirely over US Physicians as far as I
| can help it. The arrogance yet high misdiagnosis rate has pushed
| me into the Realist camp. There is no magic in US medical, just
| lots of money.
|
| Why on earth Medical is structured to have a single point of
| failure(The lone doctor), is mind boggling. In Engineering, we
| have a manager, a senior manager, a director, a plant manager,
| and program manager all that need to approve something that isnt
| even life threatening.
|
| Better hope your 1 doctor, who's a C student, legacy grad, got it
| right!
| dyauspitr wrote:
| You'll see the magic when you have cancer and they miraculously
| pull out 50% odds of survival for something terminal everywhere
| else.
| resource_waste wrote:
| In the US if a doctor says that, you deal with it.
|
| With multiple doctors, you are going to hear multiple
| opinions.
|
| Your situation isnt factual or realistic. It is a dirty
| underhanded remark.
| mateus1 wrote:
| There's a famous quote by a Brazilian far right-wing pundit:
| "In Cuba there are only 3 things that work: security, education
| and health"
| fellerts wrote:
| Would like to see the schematic and layout of the frontend board
| and a discussion on different design choices and tradeoffs. I
| designed something similar years ago (for Electrooculography, but
| it's the same principle) and getting a clean signal was by far
| the most challenging and interesting part of the project [0].
|
| I'm not familiar enough with EEG to know whether the author's
| results are good enough to use it as a BCI, but it seems like
| they got it to work (with dry electrodes nonetheless). That's a
| win!
|
| https://fellerts.no/projects/eog.php
| ron_87 wrote:
| wow your projects lools cool!
| LeifCarrotson wrote:
| The Github repo says they're using the ADS1299, which is
| basically an all-in-one solution from TI for biopotential
| measurements. It's pretty popular, with lots of other examples
| to reference.
|
| I'd assume they used the standard 5k series resistor/4.7nF
| filter capacitor arrangement the device recommends.
| ron_87 wrote:
| video how it works
| https://www.youtube.com/watch?v=s_5mDDUFp6E&t=6s
| jbandela1 wrote:
| Reminder to consider shielding and stray signals when
| interpreting an EEG.
|
| You can get an EEG trace from a blob of Jello:
|
| https://www.nytimes.com/1976/03/06/archives/jello-test-finds...
| Terr_ wrote:
| In a similar vein--or a whole vascular system--getting fMRI
| results from a dead fish.
|
| https://www.scientificamerican.com/blog/scicurious-brain/ign...
| bogtog wrote:
| What is the market for these low-cost EEG devices? I've come
| across way more companies offering this than I'd expect. I assume
| all labs at R1 or R2 Universities use equipment from bigger
| manufacturers, which I think run over $10k for a full EEG setup
| (no cage).
| Aurornis wrote:
| This isn't a medical-grade EEG device at all. This is a hobby-
| level PCB to connect the ADS1299 chip to an Arduino. This isn't
| at the level of something you'd use for actual research or
| patients.
|
| I think the market is people who want to experiment with EEG,
| but those people would be better served purchasing the ADS1299
| evaluation kit from Texas Instruments (which is,
| coincidentally, the same price as this Arduino shield).
| Aurornis wrote:
| I love seeing fun projects like this, but from what I can see in
| photos and the GitHub profile I think this would be more
| appropriate as an open-source hobby project than a $240
| commercial product without schematics available.
|
| The board is a minimal implementation of the ADS1299 chip, which
| is a highly integrated part for EEG measurements. The chip can be
| purchased for $50 or less in single quantities and your average
| electronics hobbyist could put together a basic Arduino Shield
| PCB around it in a weekend. It's a great chip. However, dealing
| with all of the complexities of low-level measurements is
| challenging. Getting good, clean signals and managing
| interference is a complex topic.
|
| The GitHub repo has a lot of empty 'readme.txt' files and scraps
| of Python scripts, but the manual and documentation are both
| empty.
|
| If anyone wants to play with this EEG chip, you can buy the
| entire professionally-designed evaluation board with a companion
| USB motherboard for $240 (the price of this Arduino shield):
| https://www.digikey.com/en/products/detail/texas-instruments...
|
| It can be wired to an Arduino if you like and it has every
| possible function of the EEG chip exposed. It also has a much
| more robust layout and more flexible connections. Getting good
| measurements of low voltage signals with a 24-bit ADC is
| complicated, so it's important to have a well designed, tested,
| and documented solution to use.
| ron_87 wrote:
| I like your comment and partially agree and if you have
| experience and time TI board is great for you
|
| I was wondering what you vision about openbci board with the
| cost $1,003 USD ?
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