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 … ...

If you’d like to design a Tic-Tac-Toe business card for yourself, ... even rgb leds and just using 2 colors would be better since every field can only ever be one color. ... Push button. 8.