Arduino began as a simple open-source circuit board built so students and artists without engineering degrees could still build working electronics, and it grew into a tool used by hobbyists, inventors, and professional engineers worldwide. The film tracks that spread across three cities, New York, Madrid, and Gijon, gathering interviews with the people who make up the Arduino ecosystem: the team that designs and maintains the hardware, the distributors who sell it, and the end-users who have wired it into their own projects. Rather than a single narrator explaining the board's importance, the film lets its subjects describe what Arduino let them build that they could not have built otherwise, from student projects to small businesses. Behind-the-scenes footage of workshops and production sits alongside the interviews, tracing the board's history from its early development to its current use. The result is less a technical manual than a portrait of a community that formed around one piece of open hardware.