// Controlling a servo position using a potentiometer (variable resistor) 
// by Michal Rinott 
// Modified by Khazar, 11/2008

#include  <Servo.h> // Include the Servo Library.
                   // Libraries are kept in the "hardware/libraries" subdirector of the
                   // Arduino application directory.

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 
int servopin = 9;  // Digital pin used to connect to the servo's control pin

void setup() 
{ 
  Serial.begin(9600);
  myservo.attach(servopin);  // Attaches the servo on servopin 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 "val" to use it with the servo (value between 0 and 180)
                                       // (See reference on "map" at http://arduino.cc/en/Reference/Map)
                                       //  map(value, fromLow, fromHigh, toLow, toHigh);
  myservo.write(val);                  // Sets the servo position according to the scaled value 
                                       // the Servo library. It goes from 0 to 180 and corresponds to the
                                       // degree of rotation.
  Serial.println(val);                   // Send the value out thru the serial port.
  delay(15);                           // Waits for the servo to get there.
} 

// Sweep
// by BARRAGAN  

#include <Servo.h> 
 
Servo myservo;  // create servo object to control a servo 
                // a maximum of eight servo objects can be created 
 
int pos = 0;    // variable to store the servo position 
 
void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
} 
 
 
void loop() 
{ 
  for(pos = 0; pos < 180; pos += 1)  // goes from 0 degrees to 180 degrees 
  {                                  // in steps of 1 degree 
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(15);                       // waits 15ms for the servo to reach the position 
  } 
  for(pos = 180; pos>=1; pos-=1)     // goes from 180 degrees to 0 degrees 
  {                                
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(15);                       // waits 15ms for the servo to reach the position 
  } 
}

// A sample of how to control 2 servos at the same time.
// Note –   Apparently, the Servo library can handle this. The library on Arduino's playground at
//          http://www.arduino.cc/playground/ComponentLib/Servotimer1 is really broken and generates
//          a bunch of errors straight from the import command. 
//
//  Khazar, 11/08

#include <Servo.h>
Servo myservo1;          // Create a servo object to control servo 1
Servo myservo2;          // Create a servo object to control servo 2

int pos1 = 0;            // Variable to hold the position of servo 1
int pos2 = 0;            // Variable to hold the position of servo 2
long timer1Val = 100;    // Variable to hold the timer for servo 1
long timer2Val = 100;    // Variable to hold the timer for servo 2
int updown1 = 1;         // Variable to hold the positive or negative change in angle 
int updown2 = 1;         // for servo 1, ditto for servo 2

void setup() {
  myservo1.attach(9);    // Attaches servo1 to pin 9;
  myservo2.attach(10);   // Attaches servo2 to pin 10;
  Serial.begin(9600);    // Turn on serial communication just in case...
  timer1Val = millis();  // init timer 1;
  timer2Val = millis();  // init timer 2;
}

void loop() {
  // Timer 1 loop
  if ((timer1Val + 100) <= millis()) {
    myservo1.write(pos1);    // do movement
    Serial.print("Servo 1 position: ");
    Serial.println(pos1);    // check value
    pos1 = pos1 + updown1;   // increment or decrement value depending on updown's value
    if (pos1 == 180) {       // If pos1 reaches 180, change directon by making updown negative
       updown1 = -1;
    }
    if (pos1 == 0) {         // If pos1 reaches 0, change direction by making updown positive
      updown1 = 1;
    }
    timer1Val = millis();    // Reset the timer
  }
  if ((timer2Val + 50) <= millis()) {
    myservo2.write(pos2);    // do movement
    Serial.print("Servo 2 position: ");
    Serial.println(pos2);    // check value
    pos2 = pos2 + updown2;   // increment or decrement value depending on updown's value
    if (pos2 == 180) {       // If pos1 reaches 180, change directon by making updown negative
       updown2 = -1;
    }
    if (pos2 == 0) {         // If pos1 reaches 0, change direction by making updown positive
       updown2 = 1;
    }
    timer2Val = millis();    // Reset the timer
  }
}