Fully Open-Access Passive Dry Electrodes BIOADC: Open-Electroencephalography (EEG) Re-Invented.

Area of Science:

• Neuroscience
• Biomedical Engineering
• Computer Science

Background:

• The Open-electroencephalography (EEG) framework facilitates EEG measurements and Brain Computer Interface (BCI) experiments.
• Existing platforms have limitations in channel count and electrode compatibility.

Purpose of the Study:

• To present a fully configurable EEG platform with expanded channel capacity and versatile electrode compatibility.
• To provide comprehensive hardware details, source code, and documentation for reproducibility.

Main Methods:

• Development of a configurable hardware platform supporting up to 32 EEG channels.
• Integration with BCI2000 EEG source driver, including source code and executable.
• Inclusion of device firmware, gerbers, and bill of materials for hardware reproducibility.

Main Results:

• Demonstration of a 32-channel EEG system compatible with various passive electrodes (textile, rubber, contactless).
• Successful implementation and testing with a single participant for alpha wave elicitation.
• Provision of adaptable circuitry for generalized biopotential measurements.

Conclusions:

• The presented configurable EEG platform overcomes limitations of existing systems, offering enhanced channel count and electrode flexibility.
• The open-source nature and detailed documentation facilitate reproducibility and adaptation for diverse BCI and biopotential research.
• Potential for expansion to 64 channels using SPI communication with the BIOADC is highlighted.