This came out recently, "A low-cost, wearable, do-it-yourself functional near-infrared spectroscopy (DIY-fNIRS) headband" https://www.sciencedirect.com/science

This came out recently, "A low-cost, wearable, do-it-yourself functional near-infrared spectroscopy (DIY-fNIRS) headband" https://www.sciencedirect.com/science/article/pii/S246806722100033X https://www.sciencedirect.com/science/article/pii/S246806722... Looking forward for that mysterious free time to build this & play around with neuro-feedback