Build log
Notes in the order they happened. Clean writeups get filed under the module they belong to; this is the messy version, where things are still broken and the explanation has not arrived yet.
A working circuit teaches you less than the story of why the previous revision did not work. That part usually goes unpublished, so it goes here.
Coming
The first entries are already in progress and will land shortly.
-
Knobcon 2026, as a first-timer
Three days in Schaumburg. Who to talk to, what the DIY area is actually like, and what I would do differently.
September 2026
-
First fabricated boards
Subspace and the mults come back from the fab. Assembly, first power-up, and whatever I got wrong in the footprints.
September 2026
-
Leaving the development board behind
Moving from a prepackaged STM32 platform to a bare part. Why timing determinism ended up mattering more than clock speed.
planned
From the oscillator work
These are written and sitting in drafts. They cover an oscillator design that is still private, so they will publish later, together, once I have decided how much of the architecture to describe.
- A scheduler that died roughly twenty seconds after every boot, and the integer wraparound underneath it
- Two and a half ohms in a crimp, and a rail that could not deliver
- Fighting a framework for control of an interrupt vector
- A combination tone descending through an octave sweep
- Using an audio interface and an FFT as the primary debugging tool