So what goes into this WOPR display? In this case, the recipe simply calls for three MAX7219 dot matrix LED modules and a Raspberry Pi Pico, although you could swap that out for your favorite ...

Instructables has posted a step-by-step guide to creating your very own dot-matrix display out of not much more than a collection of LEDs, a few wires, some resistors, and a microcontroller.

The company's line of dot matrix, 5 x 7 LED alphanumeric displays now include the first smart displays with blue characters in an 8-character, rectangular package. About the width of a AAA battery ...