The figure is a schematic diagram of the reversible counter circuit. A reversible counter is a counter that can perform both forward and reverse counting. It is divided into two types: automatic and band enabled.
In the figure, GD1 and GD2 are reflective infrared photoelectric sensors, IC1 is CD4069 inverter, IC2 is double D flip-flop CD4013, IC3 is AND gate CD4081, IC4 and IC5 are double clock decimal reversible counting, decoding, latching, driver Chip CD40110.
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