Tic-tac-toe (or “Noughts and Crosses”) is a game ... The electronic components are an Arduino with an OLED screen and a buzzer, plus three servos to operate the mechanical parts.

Here’s another entry in the 7400 Logic contest. [Circuitchef] used gates and a few flip-flops to build a two-player electronic Tic-Tac-Toe game. The full details or shared in the PDF file he ...