Arduino Potentiometer Reading

potRead.ino

//Potentiometer Reader
/*
+++Wiring+++
(ground)----(potentiometer)----|----(+5VDC)
                               |
                          Analog Pin 5     


*/
int potPin = A5; //Analog input pin 5, labeled A5
double onePercent = 10.24; //analogRead() gets the value from 0 - 1023, this is roughly the step size to get 1%

void setup() {
 Serial.begin(9600); //Initialize serial at 9600 baud
}

void loop(){
  Serial.println(calcPercent(analogRead(potPin))); //Prints the percentage of voltage(5VDC) coming from the potentiometer
  delay(200);  //Just to slow things down so you can see the precision, you would be amazed how fast 16MHz is.
}
//calculates the percentage of voltage coming through the potentiometer
double calcPercent(int pot){ //Takes the integer value from the analog pin
  double dblPot = (double)pot; //cast C integer to C double(needed for precision greater than 1 ex: 20.36
  return dblPot/onePercent; //return a value between 0.00 and 99.90
}