Step 1: Overview
In this instructable, I will show you how to make and use a "brain cap" a tDCS device that can be worn while it is being used. tDCS stands for transcranial direct current stimulation, a form of brain stimulation involving direct current (aka a battery) that can be used to treat depression, chronic pain, and other illnesses as well as reduce time needed to learn certain tasks. It does so by passing a small electrical current through the skull, which stimulates a certain patch of neurons. Don't worry, tDCS is completely safe; it only produces 2mA of current. To learn more, I would suggest searching "tDCS" in your browser since there are a lot of good articles on it online.