[HN Gopher] Measure EEG with Arduino
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Measure EEG with Arduino
Author : Christiangmer
Score : 24 points
Date : 2025-05-15 12:51 UTC (3 days ago)
(HTM) web link (www.instructables.com)
(TXT) w3m dump (www.instructables.com)
| pestatije wrote:
| > This Instructable was just published and is still pending
| review.
| spzb wrote:
| Requires only $600 worth of additional equipment. "With Arduino"
| is doing some heavy lifting.
| tsumnia wrote:
| Technically still "hobby"-level, I recently acquired the
| OpenBCI Ultracortex [1] and that's sitting at $3k
|
| [1] https://shop.openbci.com/products/the-complete-headset-eeg
| spzb wrote:
| Everything's hobby level if you have deep enough pockets.
| tsumnia wrote:
| Everything's a hobby until you want to start making money
| with it
| brookst wrote:
| I am so, so excited for the coming wave of non-invasive EEG-based
| BCI. It feels like the Internet did in the 80's: obviously on the
| way, but frustratingly far away.
| ThrowawayR2 wrote:
| This user is the PiEEG spammer on an alternate account. The
| GitHub links go to the pieeg-club account, the Youtube link goes
| to a pieeg account, the more information link in step 6 goes to
| the pieeg site. Nearly every submission from this user promotes
| PiEEG in some way even though the URLs go to different legitimate
| sites (turning on showdead is recommended):
| https://news.ycombinator.com/submitted?id=Christiangmer
|
| He's built up a really impressive network of accounts and
| apparently the HN moderators haven't noticed him yet.
|
| Pierewsa - https://news.ycombinator.com/submitted?id=Pierewsa
|
| ron_87 - https://news.ycombinator.com/submitted?id=ron_87
|
| marcelobaeb -
| https://news.ycombinator.com/submitted?id=marcelobaeb
|
| ildaron_ron -
| https://news.ycombinator.com/submitted?id=ildaron_ron
|
| Marat_Japan - https://news.ycombinator.com/threads?id=Marat_Japan
|
| Marat_1975 - https://news.ycombinator.com/submitted?id=Marat_1975
|
| Marat_1975_ -
| https://news.ycombinator.com/submitted?id=Marat_1975_
|
| Ildarmon - https://news.ycombinator.com/submitted?id=Ildarmon
|
| Teraminsa - https://news.ycombinator.com/submitted?id=Teraminsa
|
| Tiramisu-soup -
| https://news.ycombinator.com/submitted?id=Tiramisu-soup
|
| GaredFagsss1 -
| https://news.ycombinator.com/submitted?id=GaredFagsss1
|
| leisanrain - https://news.ycombinator.com/submitted?id=leisanrain
| babuloseo wrote:
| yeah this is why we vet everyone on the steamdeck sub and ask
| them for identification verification or atleast team size and
| stuff when people post their indie games to verify if they are
| really "indie" I have vetted like 30-50 man companies from UAE
| this way lol, always be asking questions and always see if
| something doesnt pass the sniff test.
| synapsomorphy wrote:
| I fabbed a couple FreeEEG32 boards [1] recently and have half of
| a design for my own board put together.
|
| This technology CANNOT effectively move a mouse around on a
| screen today, much less control robots. If it could, they
| wouldn't have to implant things in paralyzed patients' brains
| just for basic computer control.
|
| I do think it's a very interesting field and there's a lot of
| improvements to be made. It's also extremely sensitive to noise
| (for best signal you can't be anywhere near mains power), any
| movement of facial muscles completely drowns out the brain
| signal, and getting electrodes prepped properly is time consuming
| and requires skill. And even in optimal conditions the SNR is not
| amazing.
|
| I'm looking into dry, active electrodes as well as inter-
| electrode impedance detection to solve electrode prep, and a
| driven right leg circuit to help SNR. TI ADS1299 (ADC used by
| this and most other hobbyist EEG boards - directly targeted at
| EEG thus fairly expensive) has impedance detection and a DRL
| circuit but best I can tell neither is used by most boards [2].
| I'm also interested in pogo pin electrode arrays for increasing
| spatial resolution.
|
| Honestly most EEG boards seem, to me, more for show and money
| than anything else. No one even attempts to quantify noise
| levels, and they have very large margins for basically being
| breakout boards for ADC chips. (and $300+ for a fabric cap with
| passive electrodes???) And no one who says "look at all this
| stuff you can control with EEG!" has any projects of actually
| controlling anything with EEG, because it's extremely difficult.
| They just link to old papers where someone put together a control
| system slightly better than random chance.
|
| Would love to collaborate on something here if anyone has any
| interesting ideas, I think hobbyist EEG could be done a whole lot
| better.
|
| [1] https://github.com/neuroidss/FreeEEG32-beta
|
| [2] This one does implement impedance measurement which is nice.
| pedalpete wrote:
| You're completely right on so many levels.
|
| We're not hobbyist level, I'm the co-founder of
| https://affectablesleep.com, so consumer grade sleep eeg, but
| the main point is to increase the brain's restorative function,
| not just measure sleep, your watch/ring is good enough for
| that.
|
| We spent a LOT of time designing our dry electrodes, which work
| well, but in our final hardware, we've still decided to go with
| active electrodes (amplified signal, for those not familiar).
| You definitely need an RLD as well.
|
| The ability to move a mouse with just occipital electrodes and
| ref and rld has been done quite a bit, and there are projects
| such as this (https://openelectronicslab.github.io/eeg-mouse/)
| which show how it's done, as well as many published research
| papers.
|
| However, that isn't to suggest it's easy. As you've said,
| movement noise is a significant challenge. You'll need to be
| very still or else the electrode movement just causes a ton of
| noise.
|
| Your noise level comes less from the board than the electrode
| set-up.
|
| You mention [2] that does impedance measurement as well, but no
| link, can you post that?
| blitzar wrote:
| Going to make a Doc Brown Mind Reading Helmet with this.
|
| https://www.instructables.com/Back-to-the-Future-Doc-Browns-...
| babuloseo wrote:
| Anyone interested in building full dive VR machines lol.
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