In this video Karel demonstrates how to build a custom Arduino shield in under 10 minutes. He starts from the Arduino shield template available on circuits.io, adds a community designed accelerometer/gyroscope module, designs a level converter circuit, and lays out the PCB board. In the video he shows how easy it is to add new components using the Octopart-powered component builder. The resulting design files (extended Gerber) can directly be downloaded from the site and ordered at your favorite PCB manufacturer. Very soon we will also offer PCB ordering right from circuits.io.