A six-year-old builds a supercomputer. A local zoo wants to crowd-map endangered animals. A high-altitude balloonist takes pictures from near space. And now production is moving back to the U.K. It’s just all warm and fuzzy around Raspberry Pi these days. But how was the idea of a cheap, hackable, credit card-sized computer engineered into reality? Here’s the inside perspective from Raspberry Pi – it’s the first time engineer Pete Lomas shares details of how they did it, and what tradeoffs had to be made.