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The BCI Briefing

Hardware & firmware · Hardware

Ultracortex

Open design files for a 3D-printable EEG headset.

  • Widely used
  • Quiet
github.com/OpenBCI/Ultracortex (opens in a new tab)

What problem does it solve?

Gives builders a reproducible way to hold dry or wet EEG electrodes at standard scalp positions.

Who is it for?

Makers, students and labs prototyping EEG hardware

At a glance

Primary use
Hardware & firmware
Licence
GPL-3.0 · copyleft or unspecified
Language
CAD / STL
Current release
No tagged release on GitHub
Development activity
Last commit 29 Sep 2022 · repository created 27 Apr 2015
Maintainers
OpenBCI
GitHub stars
406 as of 3 Oct 2026

Repository facts are a snapshot read from the GitHub API on 3 Oct 2026; they are reported as found, not scored.

Supported modalities and use

Modalities

Real-time capability

Primarily for offline analysis

Common use cases

  • Low-cost EEG prototyping
  • Teaching

How it fits into a BCI stack

  1. Hardware

    Ultracortex

  2. Acquisition

    3 tools

  3. Streaming

    3 tools

  4. Processing

    6 tools

  5. Decoding

    4 tools

  6. Applications

    2 tools

  7. Data & standards

    3 tools

Sources

  1. 01

    github.com/OpenBCI/Ultracortex (opens in a new tab)

    Open-source repositoryGitHubChecked against source 3 Oct 2026

    Repository metadata read from the GitHub API.