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Lesson 10: Using Potentiometer reading voltage, Analog and Digital

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Please select other codes for this lecture from the links below.

We first learn the difference between Analog and digital. Then we learn what is Potentiometer and how to measure DC voltage with Arduino and the how to find the value of resistor.

 * S01-10 Potentiometer
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Get the code for the course: 
 * Written by Ahmad Shamshiri for Robojax,
 * Feb 23, 2019
const int potPin = A0;// pint name for reading voltage

void setup() {
  Serial.begin(9600);// initialize the serial monitor
  Serial.println("Reading Analog vlaue");


void loop() {
//Robojax Step By Step Arduino Course
  int potValue = analogRead(potPin);// read the input value 
  Serial.print(" Voltage:");
  float voltage = potValue * (5.0 / 1023.0);
  if(voltage >= 2.8 && voltage <= 4.1) 
    Serial.println("Voltage between 2.8 and 4.1");



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