Research Instrument — Not a Medical Device
Research Instrument — Not a Medical Device
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Same gold-standard ADC (ADS1299) with modern architecture MCU (ESP32).
| Feature | Cerelog ESP-EEG (8 CH) | PiEEG Shield ( 8 CH) | OpenBCI Cyton ( 8 CH) |
|---|---|---|---|
| Chip | ADS1299 | ADS1299 | ADS1299 |
| Standalone? | ✅ YES | ❌ (Need Pi) | ✅ YES |
| Total Cost | $349.99 | ~$415* | $1,249* |
*PiEEG total = Shield + Required Raspberry Pi.
*All prices as of DEC 18, 2025
Research Instrument — Not a Medical Device
Visualize data easily and stream to other platforms.
Get Setup Script Here →Closed-Loop Active Bias: Actively drives inverted common-mode signals back to the body.
Significantly lower noise floor & fewer artifacts.
Why Cerelog’s ESP-EEG?
Setup instructions and LSL Custom Python connection script: Here
A modified OpenBCI GUI has been forked above so you can visualize data easily and stream to other platforms. This works with its LSL streaming capability via a special Python script (in link above)!
ESP-EEG’s Python client software can stream data via the standard neuroscience software communication protocol Lab Streaming Layer. This means you can stream directly to your favorite neuroscience software or Matlab running on your laptop or remote computers, record data streams, and integrate ESP-EEG’s data with other data streams.
This board is fully compatible with BrainFlow, the industry-standard open-source library for acquiring and processing biosignals. This integration provides a unified, developer-friendly API to stream data directly into Python, C++, Java, and more, unlocking powerful tools for real-time analysis, signal processing, and BCI development.
Note: Test script to quickly view plot and acquire data -> Run ’Shared_brainflow-cerelog/python_package/cerelog_tests/filtered_plot.py’ from in above repo. (Must download and run with full Brainflow instance to use)
How to Connect ESP-EEG to BrainFlow
📄 Setup guide: Cerelog user guide — software setup & board usage
⚙️ BrainFlow instructions: GitHub /Instructions — detailed & always up to date (the setup guide above also covers BrainFlow scripting basics with the device — highly recommended)
🔗 Cerelog Main Repo: github.com/Cerelog-ESP-EEG/ESP-EEG
Unlike many consumer EEG devices that use "open-loop" or passive grounding strategies, the ESP EEG implements a True Closed-Loop Active Bias (Drive Right Leg).
The Problem: Many competitors leave the bias feedback loop open, rendering the noise cancellation ineffective against movement artifacts and 50/60Hz hum. Their bias pin effectively becomes the average of the supply rails and acts as a ground on their device making the bias pin not function as effectively intended on the ADS1299 datasheet.
Our Solution: We utilize the full capability of the ADS1299 to measure the common-mode signal, invert it, and actively drive it back into the body.
The Result: A significantly lower noise floor and fewer artifacts, allowing for research-grade data capture even in non-shielded environments.
A single Python script that pipes data directly to a browser-based GUI — no complex setup required. It’s a legacy tool with limited ongoing support, but it’s a great starting point: it connects to the PCB over serial and plots your data live in the browser.
This script is especially useful for understanding how data is moving over serial in real time. That said, the BrainFlow script above is significantly easier to work with and is the recommended path for any serious data collection or analysis.
General Visualization Software and DemosOnly use device with a laptop running on its own power supply, ensure it is not charging. Do not use this device with any computer plugged into mains power. This device does not feature isolation circuitry to protect from mains faults or power surges.
The Cerelog ESP-EEG is not a medical device nor is it intended for medical diagnosis. Read full page for all notices.
USB-C connection is the most reliable method and is fully supported.
WiFi & Bluetooth software support is under development. WiFi has been configured to bridge with an LSL script for use with the OpenBCI GUI, but is not yet set up for BrainFlow. Note: WiFi mode requires reflashing the firmware — instructions are included in the GitHub Quick Start Guide. Bluetooth is supported at the hardware level but software/firmware is not yet available.
Only use device with a laptop running on its own power supply, ensure it is not charging. Do not use this device with any computer plugged into mains power. This device does not feature isolation circuitry to protect from mains faults or power surges.
The Cerelog ESP-EEG is not a medical device nor is it intended for medical diagnosis. Read full page for all notices.
USB-C connection is the most reliable method and is fully supported.
WiFi & Bluetooth software support is under development. WiFi has been configured to bridge with an LSL script for use with the OpenBCI GUI, but is not yet set up for BrainFlow. Note: WiFi mode requires reflashing the firmware — instructions are included in the GitHub Quick Start Guide. Bluetooth is supported at the hardware level but software/firmware is not yet available.
The following items are not included but are required for a full setup.
3D print your own headset using Ultracortex files + Cerelog adapter.
View Adapter FilesSee the Cerelog ESP-EEG board in action. These demos showcase the real-time data streaming and BCI control capabilities.
Video demonstrating how to use product for real-time EEG signal data streaming and plotting.
The onboard bias probe actively works to cancel common-mode interference from sources like mains hum (50/60Hz noise). By feeding an inverted common-mode signal back to the user, it dramatically improves signal quality, allowing for clean, DC-coupled data acquisition in challenging environments. This is a critical feature for high-fidelity research that many other boards lack.
At its core, the board utilizes a research-grade ADC capable of resolving signals down to 10µV peak-to-peak (1-50Hz). While real-world performance is subject to environmental noise and setup, this high-precision foundation ensures you capture the most subtle neural signals.
By default, the board operates in a referential montage with the SRB1 pin as the - electrode reference. This mode measures each electrode against a single common reference. If you require differential mode configuration, please contact us before ordering for a firmware adjustment, or we can provide instructions for you to perform the modification.
The Cerelog EEG Circuit Board is a versatile, high-precision tool designed for advanced research applications including:
This product is intended for research, engineering, and educational purposes only. It is not a medical device and has not been evaluated by the FDA. The product is not UL or FCC certified.
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by Cerelog Inc. to be a finished end-product fit for general consumer use.
We expressly disclaim any liability whatsoever for any direct, indirect, consequential, incidental or special damages, including, without limitation, lost revenues, lost profits, losses resulting from business interruption or loss of data, arising from the use of this product.
Disclaimer: The Cerelog ESP-EEG board is not a medical device nor is it intended for medical diagnosis and provided to you "as is," and we make no express or implied warranties whatsoever with respect to its functionality, operability, or use, including, without limitation, any implied warranties, fitness for a particular purpose, or infringement. We expressly disclaim any liability whatsoever for any direct, indirect, consequential, incidental or special damages, including, without limitation, lost revenues, lost profits, losses resulting from business interruption or loss of data, regardless of the form of action or legal theory under which the liability may be asserted, even if advised of the possibility of such damages.
Cerelog Inc. assumes no liability for the performance, suitability, or use of any third-party products linked or recommended on this website.
*Wireless data transmission may be subject to bandwidth limitations and environmental factors. By ordering, you acknowledge and agree to our Terms of Service, Privacy Policy, and Legal Disclaimer.
*By ordering, you acknowledge and agree to our Return Policy.
The Cerelog EEG Circuit Board is not intended for medical use and is not approved by the FDA to treat or diagnose any conditions. Please expand and read the above Important Notices section.
*For very large orders estimated 2-4 week lead time
*(International Orders) Recipient responsible for all import duties, VAT, and broker fees.
*Please note: We are currently unable to ship this product or sell to customers of New York state.
*By ordering, you acknowledge and agree to our Terms, Privacy Policy, Legal Disclaimer, and acknowledge that you have read the Important Notice below.
*By ordering, you acknowledge and agree to our Return Policy.
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The following items are not included but are required for a full setup. These are links to third-party vendors.
A professional electrode cap is necessary for placing electrodes on the scalp. This is a recommended third-party option.
View Cap KitWe are not affiliated with this vendor.
As a cost-effective alternative, you can build your own data acquisition cap by using the 3D print files for the Ultracortex Mark III headset, a third-party project.
To make this headset compatible with the Cerelog ESP-EEG PCB, you must also print our special adapter plate (using the .stl file) and secure it to the headset with bolts or zip ties.
View Cerelog Adapter Plate FilesThe springs for the headset can be hard to find at a good price. For the soft main springs, we have found that 12mm OD, 0.6mm Wire Size, 20mm Free Length, Silver Tone springs (Size: 12x0.6x20mm) from Amazon work well.
View Recommended SpringsPlease note: We are not affiliated with the third-party vendors who provide the Ultracortex files or the recommended springs.
These adapters are essential to connect the electrode cap to the Cerelog board. You must purchase one set for an 8-channel referential setup.
View AdaptersWe are not affiliated with this vendor.
Conductive gel is needed to ensure a low-impedance connection between the electrodes and the scalp for high-quality signals. Do not use if you are allergic to any ingredients.
View Electrode GelWe are not affiliated with this vendor.
For portable, untethered use, a LIPO battery is recommended. The board has an onboard charging circuit for a 3.7V battery with a JST-PH 2.0mm connector.
View BatteryNote: Third-party product. Verify specs.