Arduino Tic Tac Toe with MAX7219 LED Matrix and Cardboard Enclosure

Necessary tools and machines

Hot glue gun (generic)

Apps and online services

Arduino IDE

About this project

Hi Hackster Community.

I'm Simone Adobs and this is my third project that I've released on Hackster. This is my first project where I create a structure with cardboard, paper and hot glue gun, that contains Arduino and other components.

This is a short video that shows you how the Tris works:

Here you can see the project from all views:

I hope you will like it, because I spent some hours on it! Now let's start with the project.

How does the Tris work?

The answer is very simple: when you click a number on the Keypad, Arduino will turn on the corresponding square.

• Can I switch players?

When you turn on a square, instantly Arduino will switch to the next player's turn.

• Does Arduino recognize when I win?

When a player wins, Arduino writes on the LED Dot Matrix:

• "1" if the winner is the player 1;

• "2" if the winner is the player 2.

When the game is finished, can I restart Arduino from a button?

You can restart the game if you click the button "0" on the keypad - Arduino restarts itself.

How can I recognize a player?

You can easily recognize a player because, although the LED Dot Matrix is only red, every player has a specific pattern formed by 2x2 LED:

• Player 1 has this pattern: "\"

• Player 2 has this other pattern: "/"

For any questions, suggestions, criticisms or code explanation, feel free to comment below. If you like this project leave a like and take a look to my other projects!

Try to make another structure or personalize my structure and send me a photo of it!

Have a NICE DAY!

Simone from Italy <3

Code

• Tech-Tris

Tech-TrisC/C++

#include <Keypad.h>
#include <LedControl.h>
#include <avr/io.h>
#include <avr/wdt.h>

#define Reset_AVR() wdt_enable(WDTO_30MS); while(1) {} 

LedControl lc=LedControl(12,10,11,1);

bool player1=true,q1=false,q2=false,q3=false,q4=false,q5=false,q6=false,q7=false,q8=false,q9=false;
int row,col,rowPlays,colPlays,result,player,winner;
char hexaKeys[4][3] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
int plays[3][3] = {
  {0,0,0},
  {0,0,0},
  {0,0,0}
};
byte rowPins[4] = {8, 7, 6, 5};
byte colPins[3] = {4, 3, 2};

Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, 4, 3); 

void setup() {
  lc.shutdown(0,false);
  lc.setIntensity(0,0);
  lc.clearDisplay(0);
}

void loop() { 
  int customKey = customKeypad.getKey();
  painting(customKey);
  win(result);
  if (winner==1) {
    lc.clearDisplay(0);
    while (winner==1) {
      char customKey = customKeypad.getKey();
      if (customKey=='0') {
        Reset_AVR();
      }
      lc.setLed(0,1,4,true);
      lc.setLed(0,2,5,true);
      lc.setLed(0,3,6,true);
      lc.setLed(0,4,7,true);
      lc.setLed(0,4,6,true);
      lc.setLed(0,4,5,true);
      lc.setLed(0,4,4,true);
      lc.setLed(0,4,3,true);
      lc.setLed(0,4,2,true);
      lc.setLed(0,4,1,true);
      lc.setLed(0,4,0,true);
      lc.setLed(0,5,0,true);
      lc.setLed(0,6,0,true);
      lc.setLed(0,3,0,true);
      lc.setLed(0,2,0,true);
    }
  }
  else if (winner==2) {
    lc.clearDisplay(0);
    while (winner==2) {
      char customKey = customKeypad.getKey();
      if (customKey=='0') {
        Reset_AVR();
      }
      lc.setLed(0,2,0,true);
      lc.setLed(0,3,0,true);
      lc.setLed(0,4,0,true);
      lc.setLed(0,5,0,true);
      lc.setLed(0,2,1,true);
      lc.setLed(0,2,2,true);
      lc.setLed(0,2,3,true);
      lc.setLed(0,2,4,true);
      lc.setLed(0,3,4,true);
      lc.setLed(0,4,4,true);
      lc.setLed(0,5,4,true);
      lc.setLed(0,5,5,true);
      lc.setLed(0,5,6,true);
      lc.setLed(0,5,7,true);
      lc.setLed(0,4,7,true);
      lc.setLed(0,3,7,true);
      lc.setLed(0,2,7,true);
    }
  }
}

int round_player() {
  if (player1) {
    player1=false;
    result=1;
  }
  else {
    player1=true;
    result=2;
  }
  return result;
}

void win(int player) {
  if (plays[0][0]==player && plays[0][1]==player && plays[0][2]==player) {
    winner=player;
  }
  else if (plays[1][0]==player && plays[1][1]==player && plays[1][2]==player) {
    winner=player;
  }
  else if (plays[2][0]==player && plays[2][1]==player && plays[2][2]==player) {
    winner=player;
  }
  else if (plays[0][0]==player && plays[1][0]==player && plays[2][0]==player) {
    winner=player;
  }
  else if (plays[0][1]==player && plays[1][1]==player && plays[2][1]==player) {
    winner=player;
  }
  else if (plays[0][2]==player && plays[1][2]==player && plays[2][2]==player) {
    winner=player;
  }
  else if (plays[0][0]==player && plays[1][1]==player && plays[2][2]==player) {
    winner=player;
  }
  else if (plays[0][2]==player && plays[1][1]==player && plays[2][0]==player) {
    winner=player;
  }
}

void switch_on_led(int col, int row, int colPlays, int rowPlays) {
  if (player1) {
    lc.setLed(0,col,row,true);
    lc.setLed(0,col+1,row-1,true);
  }
  else {
    lc.setLed(0,col,row-1,true);
    lc.setLed(0,col+1,row,true);
  }
  plays[rowPlays][colPlays]=round_player();
}

void painting(int bottone) {
  switch (bottone) {    
  case 49:
    if (!q1){
      switch_on_led(0,7,0,0);
      q1=true;
    }
    break; 
  case 50:
    if (!q2) {
      switch_on_led(3,7,0,1);
      q2=true;
    }    
    break;    
  case 51:
    if (!q3) {
      switch_on_led(6,7,0,2);
      q3=true;
    }    
    break;    
  case 52:
    if (!q4) {
      switch_on_led(0,4,1,0);
      q4=true;
    }
    break;    
  case 53:
    if (!q5) {
      switch_on_led(3,4,1,1);
      q5=true;
    }
    break;    
  case 54:
    if (!q6) {
      switch_on_led(6,4,1,2);
      q6=true;
    }    
    break;    
  case 55:
    if (!q7) {
      switch_on_led(0,1,2,0);
      q7=true;
    }    
    break;
  case 56:
    if (!q8) {
      switch_on_led(3,1,2,1);
      q8=true;
    }    
    break;    
  case 57: 
    if (!q9) {
      switch_on_led(6,1,2,2); 
      q9=true;
    } 
    break;    
  case 48:
    Reset_AVR();
    break;
  }
}

Schematics