Massimo Banzi dropped into RadioShack headquarters last week, and we couldn’t help but squeal like starstruck girls at a Bieber concert. This is the man responsible for Arduino, the open-source programmable microcontroller that essentially breathes life into electronics projects. It has allowed those with no prior engineering or programming experience to build amazing gadgets, like remote-control lawnmowers and robotic marimba players. It’s an amazing device that’s revolutionizing DIY electronics, but don’t take our word for it. We sat down for a little Q&A with Massimo, so we’ll let the man himself tell you how he went from just a kid who liked to tinker with things to the instigator of the open-source revolution.