Analogue Voltage Output
A simple example of the differences between an analogue (or analog) circuit and a digital circuit are shown below.
Analogue Voltage Output Representation
This is an analogue circuit. The output from the potentiometer varies as the wiper terminal is rotated producing an infinite number of output voltage points between 0 volts and Vmax. The output voltage can vary either slowly or rapidly from one value to the next so there is no sudden or step change between two voltage levels thereby producing a continuously variable output voltage. Examples of analogue signals include temperature, pressure, liquid levels and light intensity.