July 28th, 2024

Low-cost open-source active electrode to measure EEG

PIEEG is developing a compact, low-cost, open-source active electrode for EEG, EMG, and ECG signals, featuring advanced circuitry. They seek feedback and potential collaborations for customer interest.

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Low-cost open-source active electrode to measure EEG

PIEEG is developing a low-cost, open-source active electrode designed for measuring EEG, EMG, and ECG signals. The electrode is compact, with a diameter of only 20 mm, and features a low noise power supply, a two-stage amplifier, a controlled right leg, and a bandpass filter with four orders. It also includes a 16-bit ADC for accurate signal measurement. The company is currently in the setup phase of the analog circuitry and is seeking feedback on the interest level for such devices. They are open to collaborations and connections and are inviting potential customers to express their interest in purchasing the EEG device.

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By @TheJoeMan - 5 months
One suggestion for innovation above and beyond current expensive equipment would be to make a dual-electrode sensor with the noise cancellation built-in. I worked in a research lab that pioneered this [1], essentially when you are wearing EEG you typically have to hold your head very still due to motion artifacts. So to permit gait/prosthetic studies, they came up with gluing electrodes back to back so that the outer one just faces upwards and collects the noise. However, this doubles the equipment costs, as well as requires MATLAB post-processing for noise removal. So an all-in-one unit would be very interesting to see.

[1] https://pubmed.ncbi.nlm.nih.gov/30074489/

By @amelius - 5 months
Was anybody able to find the circuit schematics of this open-source design?
By @brookst - 5 months
I’m super interested in BCI in general, but not convinced hobbyist (< $1000) equipment is useful enough to be worth the investment at this point.

Once a year or so I check in on Emotiv and OpenBCI and Neurosky and others, and so far nothing seems to hit the affordable + casually hackable spot that will make me pull the trigger.

So yeah I’m interested, but primarily in a turnkey solution from hardware to software libraries.