shown in fig2 since the stator wheel remains stationary the signal is returned from the digit wheel slip ring segment 16 to the stator wheel slip ring segment 18 by capacitive coupling to transfer the signal data to line 23 to the motherboard as explained below with reference to fig2 a and 2b there is schematically illustrated a circuit layout for the micro controller 26 and the connection of a plurality of conductive areas 20 and 22 when a meter reading is required the micro controller 26 directs the application of the 455 khz alternating current signal sequentially to each of the stator board conductive areas 20 starting with the zero unit area and ending with the 9 area the transmitted signal will couple to a conductive area 22 on the digit wheel that is at that moment aligned with the particular conductive area 20 being driven this signal will return to the micro controller board 26 through the slip ring capacitor 16 18 and the line 23 associated with the particular stator wheel 10 the received signal will be amplified by amplifier 30 and the signal then passed through a band pass filter 41 to be further amplified by amplifiers 32 and 34 the analog signal may then be converted to a digital signal at comparator 36 before being passed to a multiplexor unit as described below micro controller 26 is powered to maintain an.