Why Electronics Projects Belong on GitHub

Software engineers use version control without thinking about it. It's such a basic part of the workflow that not using it seems almost absurd. For hardware projects — schematics, PCB layouts, firmware, BOMs — version control is much less common. Most makers manage files with dated folder names ("robot_controller_v3_final_final") and consider this adequate.

It's not adequate. And the gap between "maker who uses GitHub for hardware" and "maker who doesn't" is a gap in collaboration capability, project durability, and the ability to understand what changed and why.

What GitHub gives you for hardware projects

History: when you commit changes with meaningful messages, you build a record of every significant change to the project. "Changed motor driver from L298N to DRV8833 because of lower power dissipation" is in the history. A year later, when you're looking at why the board is designed a certain way, the history tells you.

Rollback: made a change that broke something? With version control, you can go back to the previous working state and compare diff by diff until you understand what changed. Without it, you're relying on memory and a folder full of undated files.

Collaboration: share a GitHub link and anyone can clone your project, see the history, and contribute. The alternative is emailing zip files and losing track of which version is current.

Issues and documentation: GitHub issues, README files, and wikis turn a collection of design files into a project others can actually engage with.

What to commit

Firmware: obviously. This is the easy part — firmware is already code and fits naturally into version control.

Schematics and PCB files: KiCad has decent Git support. KiCad 6+ stores schematics in a human-readable format that diffs reasonably well. Commit the KiCad source files, not just the Gerbers. The Gerbers are outputs; the source files are the design.

BOM (bill of materials): a CSV or spreadsheet exported from the design tool. This tells someone cloning the project what components they need.

Documentation: a README with what the project does, what the main design decisions were, and how to get started. This is the difference between a project someone can use and a project that only you can understand.

What not to commit: compiled binaries, large media files (use Git LFS if you need these), temporary files, and output files that can be regenerated from the sources.

The commit discipline that makes it useful

The value of version control is proportional to the quality of what you commit. Some practices that make the history useful:

Commit working states: commit when the circuit works, when the firmware compiles, when a test passes — not in the middle of a change. The history should be navigable to working states.

Write meaningful commit messages: "updated schematic" is almost useless. "Added current limiting resistors on LED outputs after calculating max GPIO drive current" is useful in three years.

Use branches for major variants: if you're trying two different power supply topologies, use branches. Compare them, merge the better one, and the branch history shows your reasoning.

Tag releases: when you order a PCB revision, tag it. "pcb-rev1", "pcb-rev2". Now you can always check out the exact design that was fabricated for any given revision.

None of this requires being a software engineer. It requires about 30 minutes of learning Git basics and the discipline to commit as you work.