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Show HN: Open-Source 8-Ch BCI Board (ESP32 and ADS1299 and OpenBCI GUI)

53 points by simontheHWguy

by simontheHWguy

1 subcomments

If you want an independent look at the specs, CNX Software and Hackster just wrote about the board here:
https://www.cnx-software.com/2025/12/26/cerelog-esp-eeg-a-lo...
And here
https://www.hackster.io/news/this-open-source-eeg-board-brin...

by evanjrowley

3 subcomments

What is your goal with the Cerelog ESP-EEG?
During my mid-teens, I got this wild idea that I could reproduce the experience of psilosybe cubensis by learning to mimic the brainwave patterns through the practice of neurofeedback. I didn't have an EEG, but I learned about the OpenEEG project. Eventually I bought an OpenEEG-based MonolithEEG[0] during a summer where I was fortunate enough to be in west Europe.
Shortly thereafter, I realized I had no experience at all with electronics assembly, and the fever dream quickly evaporated. The MonolithEEG PCB was lost to time.
[0] http://www.shifz.org/moosec/index-Dateien/Page431.htm

0 subcomment

by Curiositry

1 subcomments

This is a super cool project! Probably the most interesting neurotech hardware I've run across since OpenBCI was released.
It would be great to see a side-by-side comparison of Cerelog and OpenBCI data from the same session/patient.
A few questions:
- Could you clarify which parts of the project are licenced MIT, which are CC-BY-SA, and which are CC-BY-NC-SA? It seemed like the guide and the README had more restrictive language than the actual license file.
- What made you decide to start fresh, rather than adding the features you needed to the OpenBCI?

by khr

1 subcomments

Thanks for making this! I'm very tempted to get one of these to do some ssVEP stuff.
Do you have plans to make a 16-channel (or 32-channel?) board in the future? In my area of research, 32 channels tends to be the recommended minimum for studies.

by MrBuddyCasino

1 subcomments

> I’m happy to geek out about getting the ESP32 to stream reliably at high sample rates
Please do.

by legitronics

1 subcomments

This is very interesting. I was looking into the viability of something like this a few months ago and started seeing eye watering prices and closed off ecosystems. And many gotchas when looking into diy, more than I could justify learning about.

by willbeddow

1 subcomments