The PCB concern paper has agelong been a mode for the aspiring electronics technologist to acceptable themself isolated from their peers. Handing retired a paper that is besides a 2 subordinate crippled is simply a large mode to unafraid a mates minutes of a recruiter’s time, truthful [Ryan Chan] designed a concern paper that, successful summation to his interaction information, besides has a implicit Tic-Tac-Toe crippled built in.

[Ryan] decided that an OLED show was excessively costly for thing to manus retired and an LED matrix excessively thick, truthful helium decided to support it elemental and usage an array of 18 LEDs—9 successful each of 2 colors laid retired successful a acquainted 3×3 grid. An ATmega328p moving the Arduino bootloader serves arsenic the brains of the operation. To execute a genuinely minimal plan [Ryan] uses a azygous SMD pushbutton for control: a abbreviated property moves your selection, a longer property finalizes your move, and a several-second property switches the crippled to a single-player mode, implicit with AI.

If you’d similar to plan a Tic-Tac-Toe concern paper for yourself, [Ryan] was benignant capable to upload the schematics and codification for his card. If you’re inactive pondering what benignant of PCB concern paper champion represents you, it’s worthy checking retired cards with an updatable ePaper display oregon a tiny Tetris game.

Thanks to [Abe] for the tip!