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// Controlling a servo position using a potentiometer (variable resistor) 
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// by Michal Rinott <http://people.interaction-ivrea.it/m.rinott> 
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#include <Servo.h> 
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Servo myservo;  // create servo object to control a servo 
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int potpin = 0;  // analog pin used to connect the potentiometer
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int val;    // variable to read the value from the analog pin 
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void setup() 
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{ 
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  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
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} 
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void loop() 
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{ 
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  val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023) 
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  val = map(val, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180) 
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  myservo.write(val);                  // sets the servo position according to the scaled value 
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  delay(15);                           // waits for the servo to get there 
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}