A device is provided for delivering light to the blood supply of a human body through a non-ocular skin area. In one embodiment, a SPS receiver receives at least two signal samples representing, at least in part, common information, wherein the two signal samples are associated with one or more satellite messages. The configuration of the noise reduction board is such that various signals for forming a signal for controlling the waveform of the switching power by means of the rotating electric machine control circuit board are inputted through the noise reduction board to the rotating electric machine control circuit board. The clock signals are then mixed together according to logic states of a data stream to provide an encoded output data stream.