Using some straightforward Arduino code, one display row is set to white to guide light into a single-segment sheet. To form a complete digital, you illuminate the appropriate combination of sheets.

A library for using a 7-segment display driven with a MAX7219 or MAX7221 IC. Requires the Arduino framework. - abaskin/MAX72XX ...

This is my code for testing seven segment displays on arduino - Releases · thatCoder-saad/Arduino-7-segment-test ...

If you need a seven-segment display for a project, you could just grab some LED units off the shelf. Or you could build something big and electromechanical out of Lego. That’s precisely what ...

Each week, New York Times crossword puzzle editor and NPR's Puzzlemaster Will Shortz presents an on-air quiz to one contestant and gives a challenge for listeners at home.