Simulación Arduino 3 - Potentiometer

//Controlling a servo position using a potentiometer (variable resistor)

#include <Servo.h>
Servo myservo;    //create servo object to control a servo

int potpin=0;      //analog pin used to connect the potentiometer
int val;          //variable to read the value from the analog pin

void setup()
{
  myservo.attach(9);    //attaches the servo on pin 9 to the servo object
}

void loop()
{
  val=analogRead(potpin);         //reads the vslue of the potentiometer (value between 0 and 1023)
  val =map(val,0,1023,0,179);     //scale it to use it with the servo (value between 0 and 180)
  myservo.write(val);             //sets the servo position according to the scaled value
  delay (15);                     //waits for the servo to get there
}