This is my 2nd Mutable Instruments Eurorack clone with an STM32 Blue Pill development board. It is a clone of the Yarns module a 4channel MIDI interface with many feature, like sequencer, arpeggiator, and an oscillator.

In the video I share some of the issue I had with the build.
All details for building the module are available in GitHub:
https://github.com/TOILmodular/Yarns

Hope, you can make use of it. Let me know in the comments, if you have questions or if you also built one on your own.

BTW, the soundtrack of the video was made with the use of the arpeggiator in Yarns.
Enjoy.