Chapter 6

Analogue to Digital Conversion

Up to now we have considered inputs as being digital in operation, i.e., the input is either a 0 or 1. But suppose we wish to make temperature measurements, but not just hot or cold (1 or 0). We may for example require to:

ent Sound a buzzer if the temperature drops below freezing.

ent Turn a heater on if the temperature is below 18°C.

ent Turn on a fan if the temperature goes above 25°C.

 Turn on an alarm if the temperature ...

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