Knob

// Controlling a servo position using a potentiometer (variable resistor)
// by Michal Rinott <http://people.interaction-ivrea.it/m.rinott>
#include <Servo.h>Servo myservo;  // create servo object to control a servoint 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 value 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
}