Analog and Digital I/O refer to the type of signal being transmitted between devices and systems within an I/O operation.
Analog signals are continuous in both the value they represent and the time they correspond to. A good example to think of is a sound wave, which represents a continuous measurement of sounds over time. Other examples could be current or voltage.
Digital signals are binary. Think “On” or “Off”, “1” or “0.” In this regard, they are discrete, rather than continuous, like analog signals. With the prevalence of digital technology, digital I/O is overtaking Analog I/O as the standard to collect data. However, analog is still in use and can be converted to digital signals as well.
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