ESP-EEG is an affordable 8-channel biosensing board

· open-source devtools hardware · Source ↗

TLDR

  • Cerelog ESP-EEG is an open-source 8-channel EEG/EMG/ECG board built on the TI ADS1299, priced below half the current OpenBCI Cyton cost.

Key Takeaways

  • Uses the same TI ADS1299 24-bit 8-channel ADC as OpenBCI Cyton, but adds true closed-loop active bias for cleaner signal.
  • Built on ESP32 natively, enabling future high-bandwidth WiFi streaming, onboard LiPo charging, and flexible filter topologies.
  • Software stack supports OpenBCI GUI fork via Lab Streaming Layer and Brainflow; Bluetooth/WiFi firmware not yet ready, USB only for now.
  • USB-only mode means no electrical isolation: do not use with desktop PCs or charging laptops.
  • Licensing is split: firmware is MIT, hardware schematics are CC-BY-NC-SA (non-commercial) to protect against clones while bootstrapping.

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