I helped Klaas-Harm of Watermelon to control his awesome Zoetrope: Its a physical installation with 63 custom rendered and 3D printed figures. When seen with the right (stroboscopic) light, instead of rotating all the figures come to live, walking and skating around the installation. The installation was shown at the Eye museum in Amsterdam, during KLIK festival, and will probably travel around for the next few months.
My job was to automate the show: From a lit room, to automatically dimming the lights, starting the motor, playing the music, and starting the strobe, all timed to a track. For this we built a small arduino installation that controlled the various 220v components via relays.
Much more on the project can be seen at the site of watermelon
Or see the making of below: