PiEEG protect for Raspberry Pi allows mind laptop interfaces (Crowdfunding)

PiEEG protect for Raspberry Pi allows mind laptop interfaces (Crowdfunding)

PiEEG is an open-source {hardware} Raspberry Pi protect that measures electroencephalography (EEG), electromyography (EMG), and electrocardiography (ECG) bio-signals and offers a brain-computer interface to purposes or robots for gaming, leisure, sports activities, well being, and so on…

Ildar Rakhmatulin, a Analysis Affiliate at Heriot-Watt College in Edinburgh, is obsessed with open-source brain-computer interfaces and first created the IronBCI undertaking based mostly on ADS1299 and STM32 and printed a analysis paper entitled “Low-cost mind laptop interface for on a regular basis use” about his work. However price will increase associated to the semiconductors scarcity of latest years meant the value for his “low-cost” undertaking shot as much as over $1,000. So he went again to the drafting board and created the PiEEG protect for Raspberry Pi now accessible on Crowd Provide.

PiEEG Shield Raspberry Pi BCI

PiEEG protect specs:

  • ADC – Texas Devices ADS1299 Analog-to-Digital Converter for biopotential measurements
  • Supported SBCs – Raspberry Pi 3 or 4, and boards with the identical 40-pin GPIO header.
  • Host interface – 40-pin GPIO header with SPI protocol with a frequency from 250 SPS to 16 kSPS and a decision of 24 bits per channel
  • 8x channels for connecting moist or dry electrodes
  • Programmable sign acquire – 1, 2, 4, 6, 8, 12, 24
  • Means to measure impedance
  • Widespread-Mode Rejection Ratio CMRR – 120
  • Inner noise – 0.4 μV
  • Exterior noise – 0.8 μV
  • Sign-to-noise ratio (SNR) – 130 dB
  • Growth
    • 3x free pins for connecting exterior objects (floor and Raspberry Pi channel)
    • 33x spare pins from the Raspberry Pi GPIO can be utilized for numerous duties, like connecting exterior units
  • Misc – LEDs for energy indication and ADS1299 connection indication

Raspberry Pi 4 Brain machine interfaceYou’d simply have to insert the protect right into a Raspberry Pi 3/4 SBC, join as much as eight electrodes to seize alerts from the topic and depend on the Python, C, C++ code samples to learn knowledge from the command line or a graphical consumer interface. You’ll discover these together with PDF schematics and Gerber, and a few documentation on GitHub. There’s additionally a scientific paper entitled “Raspberry PI Protect – for measure EEG (PIEEG)” for additional insights into how this all works.

PiEEG captured data chewing blinking eyes
Chewing artifact (4-3-2-1) and blinking (solely 4 instances) in real-time for 8 electrodes by way of real_time.py high-pass filter 1-30 Hz

We’ve beforehand written about different {hardware} seize EEG or different vitals for BCI, so the PiEEG protect provides to the record of different options corresponding to HEGDuino V2, HackEEG Arduino protect, E3K all-in-one wi-fi bio-sensing platform, and others.

Ildar in contrast his design to the HackEEG and the Cyton board from openHCI, all three open-source {hardware} designs based mostly on the identical ADS1299 ADC.

PiEEG vs Cyton Board vs HackEEG

The HackEEG was once provided for $335 when it launched in 2019, however instances have modified, and it now prices $495. At $350 with 8 channels, the PiEEG is probably the most cost-effective BCI platform out of the three, and you possibly can even pledge $250 for a mannequin with simply 4 channels. Costs embody worldwide transport, and deliveries are scheduled for November 29, 2023 for the 4-channel PiEEG protect, and April 29, 2024, or over one yr from now, for the 8-channel variant.