Everyone loves LED matrices, and even if you can’t find what you like commercially, it’s pretty easy to make just what you want. Need it big ... 1.5-mm acrylic light pipe material; the ...

The Nova is a tiny RP2040 board with a 7x10 LED ... Arduino IDE. It may seem a bit restrictive to have so few LEDs, but you may be surprised as to what you can do with such a small bank of lights.