Affordable 8-Channel Brain Computer Interface Circuit Boards

EEG EMG ECG BCI

Cerelog ESP-EEG: 8 Channel Brain Computer Interface PCB

High Precision (ADS1299) Biosensing Board for recording:

EEG EMG ECG

Easily Stream Data To:

BrainFlow (Python, Java, C#, C++, R, MATLAB, Julia & more — API/SDK enables you to Create your own custom apps & Process data with Machine Learning) (custom fork) OpenBCI GUI (custom fork) Lab Stream Layer (LSL)
$649.99
$349.99 USD
You save $300
Learn More about ESP-EEG

Research Instrument — Not a Medical Device

Cerelog ESP-EEG 8-channel BCI circuit board featuring Texas Instruments ADS1299 24-bit ADC and ESP32-WROOM-DA processor, for EEG, EMG, ECG and BCI research

Applications:

BCI Research Custom Computer Interface Development

Specs:

ESP32 (WiFi & USB-C) LiPo Charging

Powering the Next Generation of BCI Research

At Cerelog, our mission is to make high-precision biosensing accessible. Built around the powerful Texas Instruments ADS1299 and the versatile ESP32 microcontroller, the ESP-EEG board brings affordable, clinical-grade EEG, EMG, and ECG data collection to researchers, developers, and DIY neuroscientists.

Common Applications & Use Cases

Brain-Computer Interfaces (BCI)

Develop software that translates brain activity into actionable commands for robotics and computing.

Neurofeedback & Cognitive Research

Stream raw, high-resolution data via Wi-Fi or USB-C to monitor attention, relaxation, and cognitive load in real-time. The data can be leveraged for established neuroscience paradigms including P300, ERP, and SSVEP, and can support quantification of emotional states such as stress, focus, and valence.

Biometric Data Logging

Accurately capture EMG (muscle) and ECG (heart) signals for sports science, prosthetic control research, and physiology studies.

Seamless Software Integration

Effortlessly stream 8-channel biosignal data directly to BrainFlow, OpenBCI GUI, or Lab Streaming Layer (LSL) for immediate machine learning and data processing.

Technical Deep Dive

Research-grade engineering details for EEG, EMG & BCI developers.

True Closed-Loop Active Bias (Drive Right Leg) vs. Open-Loop Grounding

Unlike many consumer EEG devices that use "open-loop" or passive grounding strategies, the Cerelog ESP-EEG implements a True Closed-Loop Active Bias (Drive Right Leg) using the full capability of the Texas Instruments ADS1299.

The Problem: Many competitors leave the bias feedback loop open, rendering the noise cancellation ineffective against movement artifacts and 50/60 Hz 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 as 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 — closing the feedback loop as the chip was designed to be used.

The Result: A significantly lower noise floor and fewer artifacts, allowing for research-grade data capture even in non-shielded environments.

ESP32 Native Architecture vs. Legacy PIC32 + RFduino (OpenBCI Cyton)

The Cerelog ESP-EEG is built around the ESP32-WROOM-DA — a modern dual-core 240 MHz microcontroller with native 802.11 b/g/n WiFi and Bluetooth 4.2/BLE built into the same chip. This single-chip architecture keeps the BOM lean, the board compact, and the radio stack tightly integrated with the data pipeline.

OpenBCI Cyton: Uses a PIC32 microcontroller paired with a separate RFduino module for wireless. This two-chip approach was state-of-the-art circa 2014 but introduces an additional RF bridge, a higher component count, and a more complex firmware stack — reflected in its $999+ price point.

Cerelog ESP-EEG: The ESP32 handles both data acquisition control and wireless transmission natively, removing the inter-chip communication overhead. The same gold-standard ADC (ADS1299, 24-bit) is used — the difference is purely architectural modernity and cost efficiency.

Both boards stream via BrainFlow and are compatible with the OpenBCI GUI (custom fork) and Lab Streaming Layer (LSL). The architectural difference means the Cerelog ESP-EEG delivers equivalent biosignal quality at a fraction of the price.

Cerelog ESP-EEG vs. OpenBCI Cyton — Side-by-Side Comparison
*OpenBCI Cyton price as of Dec 2025. All specs from published datasheets.
Feature Cerelog ESP-EEG OpenBCI Cyton
ADC Texas Instruments ADS1299 (24-bit) Same chip Texas Instruments ADS1299 (24-bit)
Architecture ESP32-WROOM-DA (native WiFi + BT) Modern PIC32 + RFduino (two-chip wireless)
Grounding Strategy True Closed-Loop Active Bias Open-loop passive bias
Software BrainFlow, OpenBCI GUI (fork), LSL BrainFlow, OpenBCI GUI, LSL
Price $349.99 USD 72% less $999+ USD*