Introduction: Tic Tac Toe W/ Processing & Keypad

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In this project, we will build a Tic-Tac-Toe game using an Arduino Uno and the keypad.

The game will allow you to play Tic-Tac-Toe, and then the LED corresponding to the winner will light up.

Materials Needed:

  • 1 - Arduino Uno
  • 1 - Keypad
  • 13 - Wires
  • 2 - 220 Ohm resistors
  • 2 - LED's
  • Processing Software

Step 1: Attach Keypad to the Arduino

Connect the Keypad to the Arduino. We will be using pins 2-9.

  1. Connect the pins as shown in the image above.
  2. With the keypad face up, you should connect the far left pin on the keypad to pin 9.
  3. Then, continue to the right and connect them in order going down the Arduino to pin 2

Step 2: Attach LED's to the Arduino

We will attach 2 LED's to the Arduino to show who the winner is.

1. Place the 2 LED's into the breadboard.

2. Connect a 220Ohm resistor from the Anode of the Blue LED (longer side) to pin 11 of the Arduino

3. Connect a 220Ohm resistor from the Anode of the Red LED (longer side) to pin 11 of the Arduino

4. Connect a wire from the cathode of the Blue LED (shorter side) to the ground rail on the breadboard

5. Connect a wire from the cathode of the Red LED (shorter side) to the ground rail on the breadboard

6. Connect the ground rail to the ground pin on the Arduino

Step 3: Run the Code

Download and run the 2 files provided with this tutorial

You can download Processing at processing.org

1. Run the Tic_Tac_Toe.ino file in the Arduino IDE

2. Run the Tic_Tac_Toe.pde file in Processing

3. Use the keypad to play Tic-Tac-Toe!

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