This is our very first project, a 12x8 RGB matrix. It consists of 96 RGB Leds, 6 shift registers (74HC595), some resistors and transistors and one ATmega328. The PCB is self-made. In total the color depth is 8bit (265 colors) - six bits for red and green and two for blue. The back plate is 5 mm thick foamboard and the Led pitch is 5 cm. As diffusor we used Ping Pong Balls without Label which worked out very well. We just drilled 5 mm holes into each of the balls put them over the Leds and glued to the foamboard. Some more project details can be found in the video clip shown below. The schemantic and wirering layout and the code for the Arduino can be found in the download section.
It was really fun and we learnt a lot about electronics, soldering and ping pong balls. Eventually we decided to realize some other projects we thought of and to set up this little project page to provide some information. We got inspired by a lot of other great projects we found while searching the web!