Octopus 16 is a wireless biosignal HID device for the XIAO ESP32-S3 board designed to let users play computer games using brain signals (EEG) with no hands (or implants) needed. The board packs 16 electrodes to measure biosignals, including EEG (electroencephalography), EMG (electromyography), and ECG (electrocardiography), and the coin-sized device is much more compact than other brain-computer interface (BCI) solutions, which typically require a cap kit with 8 to 16 electrodes and wires. Octopus 16 specifications: ADC – 2x Texas Instruments ADS131M08 24-bit, 8-channel, simultaneous-sampling, delta-sigma (ΔΣ) analog-to-digital converters Channels – 16x 24-bit channels (8x per ADC) Programmable gain (PGA) – x1 to x128 (set in firmware; default gain register 0x2222) Input high-pass / DC block – Integrated ADC DC-block filter enabled (≈ >1 Hz) Host interface (to XIAO board) – Power + SPI via 2x 7-pin Brain interface 18x spring-loaded pogo pins 16x electrodes 1x reference (AINREF) 1x Ground […]
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Read more here: https://www.cnx-software.com/2026/08/02/play-games-with-your-brain-signals-using-octopus-16-wireless-eeg-device/
