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Experiment 13 - The synchronous 4-bit UP/DOWN Counter

Take a look at the circuit diagram. You recognize the UP/DOWN counter from the last experiment. You can continue the chain, as all extra logical gates are already present...

Circuit diagram 4-bit UP/DOWN counter.

You could expand the chain even further...

In the next experiments, you get to know two more unusual counters, the so-called ring counters...