Reading Voltage and working with potentiometer for Arduino

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The source code for controlling Potentiometer for Arduino

//Original source:  https://www.arduino.cc/en/Tutorial/ReadAnalogVoltage

// This code is used with a video tutorial for RoboJax.com
// Published on April 24, 2017 from Aajx, ON, Canada.
// Written/Edited by A.B.S

// This Arduino


void setup()

{

  Serial.begin(9600);          //  setup serial

}



void loop(){

  int sensorValue = analogRead(A0);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (5.0 / 1023.0);
  // print out the value you read:
  Serial.print("Voltage =");// prins the text "Voltage ="
  Serial.print(voltage);
  Serial.println();
  delay(300);

}

   

Project 2 Finding the resistance value from the voltage

//Original source:  https://www.arduino.cc/en/Tutorial/ReadAnalogVoltage
// Project: Finding the resistance value from the voltage
// This code is used with a video tutorial for RoboJax.com
// Published on April 24, 2017 from Aajx, ON, Canada.
// Written/Edited by A.B.S

float RT = 50000;// the potentiometer value
float R;// the unknow R value

void setup()

{

  Serial.begin(9600);          //  setup serial

}

void loop(){

  int sensorValue = analogRead(A0);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (5.0 / 1023.0);
  // print out the value you read:
  R = ( voltage * RT)/5.0;
  Serial.print("Voltage =");// pritns the text "Voltage ="
  Serial.print(voltage);
  Serial.print("v R=");
  Serial.print(R);
  Serial.print(" ohms");
  Serial.println();
  delay(300);

}