Didn’t say this in the video, but double and triple check your solder joints! Use a multimeter to test continuity if you are unsure, and use magnification if you can.

Here's a condensed text version if you don't want to sit through the whole video: https://docs.google.com/document/d/1L...

Here are the relevant resources mentioned in the video:

Modular Addict for PCB, etc: https://modularaddict.com/
Mouser Cart: https://www.mouser.com/ProjectManager...
Thonk for Knobs, etc: https://www.thonk.co.uk/
Building Vagrant development environment: https://github.com/pichenettes/mutabl...
Muff Wiggler thread: https://www.muffwiggler.com/forum/vie...
Drag Soldering:    • HowTo: Drag Soldering Demo  
TS-100 soldering iron: https://www.amazon.com/UY-CHAN-Progra...
STM32F0 Discovery: https://www.mouser.com/ProductDetail/...
More Mutable Instruments DIY info: https://www.amazingsynth.com/pcb-info/

One day I might have a charismatic camera presence, but today is not that day. Hopefully this was a useful video anyways.