Counters

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\| Basic 4-Bit Counter \| Synchronous Binary Counter \| Synchronous Decimal Counter \| Frequency Dividers \| Counting in Reverse \| The Johnson Counter \|

Counters

Now that we've looked at a number different flip-flop circuits, what can we do with them by combining them in groups? One possibility is to remember and record a count of clock pulses rather than just a single past event. If we can count events and display the count, we can make use of that capability in many ways.

Basic 4-Bit Counter: A very basic binary counter.
Synchronous Binary Counter: Making all flip-flops in the counter change state at the same time.
Synchronous Decimal Counter: Shortening the count to represent a single decimal digit.
Frequency Dividers: A counting twist: dividing the clock frequency by a fixed integer value.
Counting in Reverse: Sometimes we want a countdown to a selected moment.
The Johnson Counter: Here's a counting circuit with very simple output decoding.