In ‘History of the Computer – the emergence of Electronics’, we saw how the development of Radar during the second world war led to an understanding of pulse technology. At the same time methods were refined for the calculations required for the ballistic trajectories. From these beginnings, the digital computer was developed.
What is meant by ‘Analog’ and ‘Digital’? A couple of examples will explain the difference. An analog is something which is analogous, obviously, but you may know that an analogous process or function is one that is equivalent, or very similar to another one. An analogy is often used to explain, or to assist the understanding of, some new feature in terms that are understood.
For example a home electric circuit for house wiring to operate a lamp. The supply is controlled by a circuit breaker, when it is available at the outlet where the lamp is plugged. This can be compared to plumbing, where the water supply is controlled by a valve or tap on entering the home, then pipes carry the water to the kitchen, where the supply can be turned on or off by a tap or faucet, and is immediately available. The...
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