Flip-Flops – A basic counter
We looked at the Binary system, and basic computer logic elements, in previous articles, “It’s a binary world – how computers count” and “How computers add – a logical approach”.
Now we can combine two parts of these articles to look at a counter. Another common logic element in a computer is a counter or timer. This can b to count items going past a sensor on an assembly line, or possibly a count-down timer. For example, if you have a late model washing machine it will have a simple computer using a count down timer to give 10 minute wash cycle, etc.
There are several types of counter, nearly all of which use a basic element of electronics, the Flip-Flop. And you thought they were rubber shoes English people wear to the shower or the beach. (At this point Australians say “I thought they were called thongs”).
OK back on topic. The flip-flop is as old as electronics, and is a classic example of the binary system. It has two possible stable states, A or B, and can be ‘toggled’ from one state to the other, just like a ‘push-on, push-off’...
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