PiEEG 

Low-Cost brain computer interfaces for RaspberryPi (PiEEG), Arduino(ardEEG), Jetson Nano (JNEEG) and other.
This project is the result of several years of work on the development of Brain-computer interface (BCI) for measure EEG, EMG and EKG with RaspberryPi, Jetson Nano, Arduino etc. We want to provide an easy way to get started with biosignals to use a shield. We will try to reveal the process of reading EEG signals as fully and clearly as possible.
https://pieeg.com/