/***************************************************************
/*Servo_Button written by Russell Winkler for Things That Think
/*at University of Colorado, Boulder.  Spring 2011
/***************************************************************/

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

const int buttonPin = A0; // create a button that listens on the AO input pin

int pos = 0;    // variable to store the servo position 
int rotations = 2.5;    // variable that determines the number of rotations (1 = 360 degrees)
int buttonState = 0;  // variable used to store the current button state (on or off)

void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
  myservo.write(85); // using a continuous servo 90 is full stop
  pinMode(buttonPin, INPUT); // set the button as an input 
  Serial.begin(9600); //Outputs any serial communications
} 
 
//Main loop that listens for the press of the button and scrolls the paper accordingly
void loop() 
{ 
  buttonState = digitalRead(buttonPin); // reads the button input
  
  if(buttonState == HIGH) { // if the button is on
    myservo.write(100); // makes the servo rotate slowly in a counterclockwise direction
    delay(1150 * rotations); // for the set amount of milliseconds
    myservo.write(90); // stops the servo
  } else {
    myservo.write(85); // if the button is off, stop the servo.
  }
}