Please read the general section first! Purpose The MattzoTrainController for Power Functions (MTC4PF) acts as a controller for LEGO Power Function Train Motors (or compatible) or other Power Function motors, e.g. the XL motor for the Emerald Express. The MTC4PF also switches train lights on and off. The MTC4PF can … Continue reading MattzoTrainController for Power Functions (MTC4PF)