LeoneLabs created PixelBrite, a study in pixels. This amazing build is more than a light table. It’s a digital Lite-Brite, minimalist light sculpture, a disco light, a sound reactive light show all rolled into one.
With batteries and a slot for and SD card to stream patterns without a computer, PixelBrite can act as a standalone light. You can also plug it into a MIDI controller and have a interactive light show.
The Instructible page on the project is well worth reading. It’s incredibly detailed and contains not only build details (like a complete bill of materials spreadsheet) but some information on color theory and display science as well.
The project is open source with the code available on GitHub.