On the software end of things there are multiple ways to get images onto a DIY RGB panel ... An inconvenient size! An LED strip with 30 LEDs per meter puts individual LEDs about 33 mm apart.

The LED strip is attached to one side of the tube, with parchment paper layered inside the tubes to act as a diffuser. Building in quantities of 8 or more, [Super Valid Designs] reckons that the ...