This Tiny Handheld Uses 165 LEDs as a Screen
Modern handheld gaming consoles have high-resolution displays and detailed 3D graphics, but you don't need all of that to play a fun game. Some of the earliest handheld electronic games used little more than a handful of LEDs as a display, yet the games were still a blast. YouTuber ItzSunBoi decided to revisit that approach with Gigaplex, a tiny, custom-built gaming console that uses 165 individual LEDs instead of a conventional display.
The project began as an experiment with Charlieplexing, a technique that allows a microcontroller to control a large number of LEDs using relatively few pins. As a starting point, ItzSunBoi arranged 165 surface-mount LEDs into an 11×15 grid on a custom PCB.
Controlling that many LEDs would normally require an impractical number of connections, especially with the project's 32-pin microcontroller. Charlieplexing solves this problem by taking advantage of the ability of GPIO pins to operate in three states:...
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