We offer case studies in the ways that digital fabrication allows us to treat the designs of products as a kind of source code: files that can be freely shared, modified, and produced. In particular, the case studies combine traditional electronic circuit boards and components (a mature digital fabrication process) with laser-cut or 3D printed materials. They demonstrate numerous possibilities for individual customizations both pre- and post-fabrication, as well as a variety of potential production and distribution processes and scales.