I finished my first own MIDI-Controller with the Brain Jr. Works like a blast, only glitch I have is that the encoder I use on 8+10 gets into conflict with two buttons i have on 9+11 the other encoders are on 12+14/13+15. Anyone had this behavior? When I enable the encoder on 8+10 the two buttons turn into an encoder as well. Other than that - I am quite happy. I tried to get the most out of all the available inputs and managed to use every single one of them:
14 Buttons with LED Feedback
2 Status LEDs
ps: Livid, your headers are super tiny and unconventional, that makes some things a bit hard to solder.