The Testboard Head is the equipment needed to test and debug protocols with stimulation. This testboard is a collection of resistors that simulate an "artificial head" so that the impedance "seen" by any electrode is about 5 kΩ with 5% precision. The resistors produce Nyquist noise and they also pick up noise from the environment. Neuroelectrics® devices connected to the Testboard respond as if they were properly placed on a subject's head with similar electrical environment. See our wiki for more info.