Arduino Handheld 1D Pong Game

in this project we'll be seeing the supplies , the code and the steps needed to make a handheld one dimentional pong game around a simple arduino board.

we'll only be needing a handful of components :

*An arduino nano development board.

*A handful of led's of different colors.

*Two push buttons of diffent colors.

*Along with about 2 meters of wire , aproject box to house all the electronics , a soldering iron , solder , a bit of hot glue And a computer with the arduino IDE software installed.

int pins[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13};   //the main led pins.
int state;    //variable for the first player button's state before it's supposed to be pressed.
int state2;   //variable for the second player button's state before it's supposed to be pressed.
int btn1;   //variable for the first player button's state when it's supposed to be pressed.
int btn2;   //variable for the second player button's state when it's supposed to be pressed.
int timer;    //variable for the game speed.
int count;    //variable for the speed counter.
int score1;   //variable for the first player's score.
int score2;   //variable for the second player's score.

void setup() {
  for (int i = 0; i <= 13 ; i ++){    //initializing all the pins as outputs.
    pinMode(pins[i],OUTPUT);
  }
  
  pinMode(A2,OUTPUT);   //initializing the first player's led pin as output.
  pinMode(A3,OUTPUT);   //initializing the second player's led pin as output.

  for (int i = 0; i <= 13 ; i ++){    //setting all the pins to low , turning all the led's off.
    digitalWrite(pins[i],HIGH);
  }

   //setting the player led's pins low , turning them off.
   digitalWrite(A2,HIGH); 
   digitalWrite(A3,HIGH);

   pinMode(A0, INPUT_PULLUP);   //initializing the first player's button pin as a pulled up input.
   pinMode(A1, INPUT_PULLUP);   //initializing the second player's button pin as a pulled up input.
   
}

void loop() {
  timing(count);    //modifying the time depending on the stage of the game.
  
  animation();    //the main game function.
}

void timing(int x){   //function for increasing the speed of the game each time / playing the winning animation at the end of it.
  switch(x){    //reading the value of the entered variable.
      //changing the time variable according to the counter value.
    case 0:
      timer = 40;
    break;
    
    case 1:
      timer = 30;
    break;
      
    case 2:
      timer = 30;
    break;

    case 3:
      timer = 20;
    break;

    case 4:
      timer = 20;
    break;

    case 5:
      timer = 20;
    break;

    case 6:
       timer = 10;
    break;

    case 7:
       timer = 10;
    break;

    case 8:
      timer = 10;
    break;

    case 9:   
      timer = 7;
    break;

    case 10:
      timer = 7;
    break;

    case 11:
      blinck(200);    //blinks tll the led's twice.
      blinck(200);
     if(score2 < score1){   //if the player 1 wins , flash his led.
      victory(1); 
     }
     if(score1 < score2){    //if the player 1 wins , flash his led.
      victory(2); 
     }

     //restore all the variables.
     count = 0;
     score1 = 0;
     score2 = 0;
    break;
    
  }
}

void animation(){   //main function , for animating the led's and checking the buttons for presses.
  Forward_Animation(11);    //plays the forward animation for the first 11 led's.

 digitalWrite(pins[12],LOW);
 
 Before_Check(1);   //check if the button was pressed before it's supposed to , in which case , cancel the try.
 
  delay(timer);
  digitalWrite(pins[12],HIGH);
  delay(timer);
  digitalWrite(pins[13],LOW);
 
  check(2);   //check if the button was pressed at the beginning.
 
  delay(timer/2);
  
  check(2);   //re-check if the button was pressed half-way throught.
  state = false;    //restore the values.
  
  delay(timer/2);
  digitalWrite(pins[13],HIGH);
  delay(timer);
  
  Backward_Animation(11);    //playing the backward animation for the last 11 led's.
  
  digitalWrite(pins[1],LOW);
 
  Before_Check(2);    //check if the button was pressed before it's supposed to , in which case , cancel the try.
  
  delay(timer);
  digitalWrite(pins[1],HIGH);
  delay(timer);
  digitalWrite(pins[0],LOW);
 
 check(1);    //check if the button was pressed at the beginning.
  
 delay(timer/2);
 
 check(1);    //re-check if the button was pressed half-way throught.
 state2 = false;    //restore the values.
 
 delay(timer/2);
 digitalWrite(pins[0],HIGH);
 delay(timer);
}

void Forward_Animation(int x){    //function for playing the forward animation for the speciffied number of led's.
  for (int i = 0; i <= x ; i ++){   //blinking the led's for the speciffied number of times.
    digitalWrite(i,LOW);
    delay(timer);
    digitalWrite(i,HIGH);
    delay(timer);
  }
}

void Backward_Animation(int y){   //function for playing the backward animation for the speciffied number of led's.
  int z = (13 - y);
  for (int i = 12; i >= y ; i= i-1){    //blinking the led's for the speciffied number of times.
     digitalWrite(i,LOW);
     delay(timer);
     digitalWrite(i,HIGH);
     delay(timer);
   }
}

void Before_Check(int num){   //function for checking if the button was pressed before it was supposed to , to cancel the try.
  if (num == 1){    //if it's for player one , then set the player one parametrs.
    btn2 = digitalRead(A1);
    if(btn2 == 0){
      state = true;
    }
  }

  if (num == 2){    //if it's for player one , then set the player one parametrs.
    btn1 = digitalRead(A0);
    if(btn1 == 0){
      state2 = true;
    }
  }
}

void check(int number){   //function for checking if the button was pressed when it should.
  if (number == 1){   //if it's for the player number one.
    btn1 = digitalRead(A0);   //attach the state of the button to the variable.
  if(state2 == false){    //if the button wasn't pressed prier.
     if(btn1 == 0){   //if the button is pressed.
     blinck(200);   //blink the lights.
     score(2);    //flash the led for the player that pressed the button.
     count++;   //transition to the next speed.
     score1++;    //adding a point to the player score.
    }
     }
  }

  if (number == 2){   //if it's for the player number one.
    btn2 = digitalRead(A1);   //attach the state of the button to the variable.
  if(state == false){   //if the button wasn't pressed prier.
    if(btn2 == 0){    //if the button is pressed.
    blinck(200);    //blink the lights.
    score(1);   //flash the led for the player that pressed the button.
    count++;     //transition to the next speed.
    score2++;   //adding a point to the player score.
   }
    }
  }
}

void blinck(int x){   //function for bliking all the led's for a certain amount of time.
 for(int i = 0; i <= 13; i++){    //turning all the led's on one by one.
  digitalWrite(i,LOW);
 }
  delay(x);   //waiting some time.
  for(int i = 0; i <= 13; i++){   //turning all the led's off one by one.
  digitalWrite(i,HIGH);
 }
  delay(x);   //waiting some time.

 for(int i = 0; i <= 13; i++){    //turning all the led's on one by one.
  digitalWrite(i,LOW);
 }
  delay(x);   //waiting some time.
  for(int i = 0; i <= 13; i++){   //turning all the led's off one by one.
  digitalWrite(i,HIGH);
 }
  delay(x);   //waiting some time.
}

void score(int playa){    //function for blinking the led of the player that gained a point.
  if (playa == 1){    //if it's the player number one.
    //turns the led on and off with a delay in between.
  digitalWrite(A2,LOW);
  delay(100);
  digitalWrite(A2,HIGH);
  delay(100);
   digitalWrite(A2,LOW);
  delay(100);
  digitalWrite(A2,HIGH);
  delay(50);
  }
  if (playa == 2){    //if it's the player number two.
    //turns the led on and off with a delay in between.
  digitalWrite(A3,LOW);
  delay(100);
  digitalWrite(A3,HIGH);
  delay(100);
   digitalWrite(A3,LOW);
  delay(100);
  digitalWrite(A3,HIGH);
  delay(50);
  }
}

void victory(int player){   //function for blinking th ewinner player' led.
  if(player == 1){    //if it's the first player.
    //turns the led on and off with a longer delay in between.
  digitalWrite(A2,LOW);
  delay(750);
  digitalWrite(A2,HIGH);
  delay(750);
  }

  if(player == 2){    //if it's the second player.
    //turns the led on and off with a longer delay in between.
  digitalWrite(A3,LOW);
  delay(750);
  digitalWrite(A3,HIGH);
  delay(750);
  }
}

the code is self explanitory , all needed information , along with the wiring method is explained thoroughly in the file , throught comments.

The wiring job isn't difficult , just follow the above wiring diagram , and be careful using a soldering iron.

at the end , you sould have something resembling the above images , re-check all your connections for short circuits before powering the microcontroller.

with a bit of care , your project should function correctly , and look something like the above image.