Combined speedometer and odometer - applies pulses to circuit which adds one and applies to store and simultaneously displayed via multiplexer

摘要

The odometer display has an integrated circuit to which pulses of a tachometer pick-up are applied through a divider. A separate external electrostatic store is allocated to the circuit with comprises a control logic circuit, an intermediate store, an adder, a multiplexer, a clock and a decoder, so connected that pulses coming from the divider are applied by the control logic circuit to the electrostatic store and read out from it. The read-out value is added to the value '1' and this is rewritten in the store in the same rhythm. The new result is simultaneously taken over by the intermediate store and applied through the multiplexer to a display instrument.