Description
This compact up down counter enables you to count from 0 to 999 in Up as well as Down mode at any instant of counting. This digital counter is suitable for many applications such as clock generator, frequency meters etc.
The circuit uses three Up/Down counter IC1, IC2 & IC3 and three BCD to seven segment decoder IC4, IC5 & IC6. The clock circuit and Up/Down switching are designed using NOR gate as IC5. Three 7-segment displays in common cathode configuration are used to display the count.
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