Explore the world of interactive digital art installations in this 42-minute conference talk from Hackaday | Belgrade. Dive into the innovative projects of digital artist Seb Lee-Delisle, who combines high-end projectors, sound, and high-powered lasers to create magical user experiences. Learn about the Laser Light Synth project, featuring a custom keyboard controller with LED-backlit keys and touch-sensitive copper foil patterns. Discover the intricate process of designing and building these installations, from CAD design and PCB creation to MIDI integration and final assembly. Gain insights into the use of Ableton Live, previsualization techniques, and the challenges of working with lasers and projectors. Follow Seb's journey from initial prototypes to the finished product, and get inspired by the intersection of technology and art in creating epic interactive experiences.