Ryan Chan

Tic-Tac-Toe on a Business Card

PCB business cards have always fascinated me, so I’ve decided to design my own card that plays tic-tac-toe for the upcoming job and internship application season.

There are 18 LED lights on the board, where each position on the tic-tac-toe grid has 2 lights: a blue one for player one and a red one for plater two. There is also a button that you use to place your mark on the tic-tac-toe board. Your current position is marked by a blinking LED and pressing the button quickly will move you to a new position. Once you’re at the desired position, you hold the button to place your mark and the turn moves to the other player. The first player to get three marks in a row wins. An ATmega328P microcontroller is used to control all this logic.

This project has also been featured on Hackaday.com

Part 2 Video

Part 1 Video

Project Pages

Includes documentation, code, and schematics: