Make a LED matrix by disguising it as a solder exercise. The idea is to have a large gathering of modules on a wall that is constantly running and when the soldering is done it should be easy to just plug in one more module.
- Buy cheap LEDs
- 5x5mm rgb 0,2 kr or
- 3,2x2,7mm rgb 0,23 kr
- Source a cheap led driver
- something like SSD1331 or something simpler like STP24DP05 (MBI5324 is a china clone of that one)
WS2803 3,30 kr drives 6 LEDs. Both dil and surface mount.