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Lesson 19-2: Measuring Voltage from a Potentiometer and Displaying it on Screen

In this lecture, we learn how to use LCD screens: both 2-line and 4-line LCDs (LCD1602 and LCD2004). We first learn about the module, then we learn how to get the I2C address for the module, then we learn how to display text on both lines.

A counter example, which counts from 0, is shown. Then we learn how to measure the DC voltage from a variable resistor (or potentiometer).

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