I used an OpenBCI Ganglion and Brainflow to make a neurofeedback program to help enhance meditation sessions.

Video

https://youtu.be/rz8b1csp7WI

Articles

The Neuroscience

Using Neurofeedback to Enhance Meditation Part 1: The Neuroscience

The Technical

Using Neurofeedback to Enhance Meditation Part 2: The Technical

Github Repo

vavaviper/meditation_neurofeedback