Thinking in Public
Build logs, process notes, and essays on open hardware. Written as we go.
copperhead is an AI agent that designs, documents, and validates real PCBs from a prompt, working on the KiCad files already in your repository. Built and proven on Open Telegraph, a shipping open source board.
Read more →Most people use Claude to write code. We use it to design open source hardware. A look at how Open Telegraph gets built with Claude Code open on the repo, reading datasheets, picking parts, and laying out the board.
Read more →Most manufacturers treat tolerance specs as proprietary. We think that is backwards. Here is why we publish them first and what it has taught us about our own quality standards.
We chose the Strongly Reciprocal variant of the CERN Open Hardware License. This is what that means in practice and why the weaker variant was not enough.
What we are building, why we are building it in the open, and what we believe about the future of hardware manufacturing.