Hey, I&#x27;m not affiliated with Cerelog, but I&#x27;m the author of the article and those are my typos. Fixed!Thanks for pointing this out.

Great project.
Put up a small issue on Github for a couple of the links in the article.<a href="https:&#x2F;&#x2F;github.com&#x2F;Cerelog-ESP-EEG&#x2F;ESP-EEG&#x2F;issues&#x2F;1" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;Cerelog-ESP-EEG&#x2F;ESP-EEG&#x2F;issues&#x2F;1</a>A quick look over the other links looks like they&#x27;re okay, follow them instead for the moment.

Related:Show HN: Open-Source 8-Ch BCI Board (ESP32 and ADS1299 and OpenBCI GUI) - <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=46502051">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=46502051</a> - Jan 2026 (21 comments)

If anyone is interested, I&#x27;m actually in the process of launching a similar board. Much lower noise (by about 5x, custom AFE), tuned for load cells, 4 simultaneous-sampling channels.

In Africa, clever locals built a humidy crib from car parts. It ended up not working as a product, but a great idea. In the link below, its celebrated as a failure to learn from.<a href="https:&#x2F;&#x2F;www.bbc.com&#x2F;future&#x2F;article&#x2F;20140430-why-bad-inventions-are-good#:~:text=Prestero%20built%20a%20device%20called,door%20chime%20for%20an%20alarm." rel="nofollow">https:&#x2F;&#x2F;www.bbc.com&#x2F;future&#x2F;article&#x2F;20140430-why-bad-inventio...</a>There&#x27;s another affordable humidy crib here,
<a href="https:&#x2F;&#x2F;www.theguardian.com&#x2F;global-development&#x2F;2014&#x2F;dec&#x2F;25&#x2F;inflatable-incubator-premature-babies" rel="nofollow">https:&#x2F;&#x2F;www.theguardian.com&#x2F;global-development&#x2F;2014&#x2F;dec&#x2F;25&#x2F;i...</a>I think EEGs (Electro EncepheloGraph) can produce a far more detailed, brain related view of what an ECG (Electro CardioGraphs) can produce. An EEG can of course look into many other brain related issues.Creating a low cost version of an EEG will hopefully at least provide some thoughts to the engineers of commercial EEGs.Commercial devices are tied down to providing- Full checks of the software and hardware design,- backwards compatibility for devices over their lifespan- A full medically based software&#x2F;hardware quality check,- Providing very detailed documentation,- doing a full test cycle around the device- Interacting with doctors and health experts to fully characterise the domain and typical device use.

Could do more accurate but less comfortable sleep tracking

Cool. What are useful aaplications of diy EEG?

Part of what you&#x27;re paying for with the ADS1299 is simultaneous sampling, which you can get by without. You could use a single-channel 24-bit ADC and multiplex it yourself with generic analog switch ICs. That gives you a much larger array of part-selection options.Or try the newer ADS122S14.

tl;dr it usesTexas Instruments ADS1299 (24-bit, 8-channel) analog-digital converterThere is no way to do what that chip does for less, maybe 7$ less but then not as good. They have priced it perfectly and I hate them for it.<a href="https:&#x2F;&#x2F;www.digikey.com&#x2F;en&#x2F;products&#x2F;detail&#x2F;texas-instruments&#x2F;ADS1299IPAGR&#x2F;3536907" rel="nofollow">https:&#x2F;&#x2F;www.digikey.com&#x2F;en&#x2F;products&#x2F;detail&#x2F;texas-instruments...</a>

ESP-EEG is an affordable 8-channel biosensing board