The Open Circuit Institute (OCI) is a community devoted to open source circuit board design, manufacturing, and theory. The community consists of engineers and hobbyists alike - and anyone can join and contribute. OCI is first and foremost a circuit design repository. These circuits can be stand alone devices, or constituent pieces that can be used in more complex circuit boards. OCI also has aspirations to be an educational resource, lowering the barrier of electronics to all non-professionals. Anyone can design and create their own useful circuit boards!