Low-cost shield ardEEG to measure EEG with Arduino Uno R4 WiFi

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.

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

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...

GitHub repo: https://github.com/Ildaron/ardEEG

Available for purchase: https://pieeg.com/ardeeg/

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!

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).

video how it works https://www.youtube.com/watch?v=s_5mDDUFp6E&t=6s