++
/*
 * S01-10 Potentiometer R value

  Please watch video instruction here https://youtu.be/wuNrzQ8rpYw
 This code is available at http://robojax.com/course1/?vid=lecture10
 
with over 100 lectures Free On YouTube. Watch it here http://robojax.com/L/?id=338
Get the code for the course: http://robojax.com/L/?id=339 
 * Written by Ahmad Shamshiri for Robojax, robojax.com https://www.youtube.com/robojaxTV
 * Feb 23, 2019
 * 
 */
const int potPin = A0;// pin name for reading voltage
float RT = 10000;// the potentiometer value 10k
float R;// the unknown R value

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

}

void loop() {
  int potValue = analogRead(potPin);// read the input value 
  float voltage = potValue * (5.0 / 1023.0);// calculate voltage
  R = ( voltage * RT)/5.0;// calculate R
  Serial.print("R :");
  Serial.print(R);
  Serial.print(" Ohms V:");
  Serial.print(voltage);
  Serial.println("V");
  delay(200);

}