An interference modulator incorporates anti-reflection coatings andor micro-fabricated supplemental lighting sources. When a supply voltage becomes higher than a first output circuit reversal threshold voltage after a reset signal is output, a first control circuit operates so that the reset signal is not output. The anode and cathode separator plates include opposing sides in which one of the opposing sides of the anode and cathode respectively have fuel and oxidant flow fields in communication with the membrane. The subsequent scanning step relates to correlating the values obtained during the scanning with a filtering matrix, consisting of a sequence of matrix values, for generating a filtered receiver output signal that consists of a discrete sequence of receiver output signal values. The contact surface is associated with the vehicle door and is inwardly offset from the rod.