===Two-Button Flip-Flop Servo===

[[http://www.youtube.com/watch?v=DoaFVhnTEDY&feature=youtu.be|{{:start:classes:principlesofdesign:arduinogames:youtube_ff_servo_demo.png}}]]

<file>
#include <Servo.h> 
 
Servo myservo;  // create servo object to control a servo 
                 
 
int pos = 90;    // variable to store servo position
int buttonState1 = 0; // to set variables for when button is pressed or not
int buttonState2 = 0; //same as above

void setup() 
{ 
  myservo.attach(8);  // attaches the servo on pin 8 to the servo object 
  myservo.write(pos); // restores servo's neutral position
  pinMode(2, INPUT); // sets pin 2 as where data will be inputed
  pinMode(4, INPUT); // sets pin 4 as where data will be inputed
  
} 
 
 
void loop() 
{ buttonState1 = digitalRead(2); // the data is read digitally by the state of the button and serves as the "input"
  buttonState2 = digitalRead (4);

if (buttonState1 == HIGH){ //basically when the button is pressed. 
  //when the button is pressed, connects the circuit, so the signal, which is voltage, goes back to the arduino. 
  
  /**if( pos > 30)--pos; //this is a commented out section. Not very good for the flip-flop purpose 
    myservo.write(pos);**/ 
    myservo.write(15);   //this means to turn the servo CCW to a certain position.
                         // The CCW range is from 0 to 90
    delay(10);           // you should also play around with delay times (the number is milliseconds) to increase speed
}                         
 
 if (buttonState2 == HIGH){
  /** if( pos < 150) ++pos;
      myservo.write(pos);**/
      myservo.write(165); // Clockwise ranges from 90 to 180 
      delay(10);
 }
else{
     myservo.write(pos); //if neither of the buttons are pressed, then  
   }                     // the servo should return to the 90 neutral position
   
}
  </file>