Wearable EEG Headband
While this device was never tested overnight, it was tested during multiple activities with different levels of brain engagement, such as meditating, creative drawing, and solving complex math problems. Not only could the data be logged directly to your phone over Bluetooth, but we also use the RGB Neo Pixel LED to show which brain wave frequency band was the most dominant over the last few seconds (gamma, beta, alpha, theta, or delta). The results we found matched up well with the literature, with higher-intensity activies matching up with higher brain wave frequencies. The entire build process was made public on Instructables.