How it works
Circuit board and enclosure for a sim-racing button box. What Button Box does, what it’s built with, and how far along it is.
- Title
- Product
- Dwg no.
- Q2-PRO
- Rev
- 2026.1
- Part of
- Button Box
The premise
The electrical and mechanical design for the Mission City Motorsport button box: schematic, board layout and enclosure, built around an STM32L432. There’s also a battery board for a wireless version (schematic only) and an enclosure for a matching volume box.
What’s included
KiCad schematic and PCB layout, with a matching enclosure design
Uses the shared in-house symbol and footprint libraries
How it’s built
Button Box is built on KiCad, STM32L432 and SolidWorks.
The repository is 100% Python by volume.
It carries 13 commits since Aug 2026, most recently changed in Aug 2026.
How the work is done
Every project here starts as a written spec, and the spec stays the source of truth once there’s code. The repository keeps a build plan with current status, an append-only decision log of where the code departed from the plan, and a handoff document that describes where things stand, including the unfinished parts.
That’s how one person keeps this many projects moving, and it’s what this page is written from.
Current state
In development. Being worked on now.
The source is private, so the way to check what this page says is to use the product.
Next
Build on Button Box
Ask about licensing the platform, bringing up a board, or contract firmware work.