An apparatus and a method switch a load through a power transistor. Processes for making the GIG and membrane electrode assemblies incorporating the GIG are also described. The first capacitor group includes at least one first storage capacitor for storing electric charges for driving source driving signals, and at least one first flying capacitor. The RUI allows the user to read the status of and control the irrigation components and ancillary equipment from any location, without requiring the user to be at the irrigation component controls or at a specific location in the field.