In this lesson, we show step by step how to read analog voltages using the Arduino. We show how to convert the read values to actual voltages.
As we advance to sensors we'll need to understand and incorporate analogRead statements. The sensor will return information back to the Arduino as a voltage. We'll need to code the Arduino to receive information and act on it.
This process requires us to understand the read voltages in the scale of 0-1023 (binary numbers). 0 is 0volts and 1023 is 5volts.