Constantin:
Your power supply is totally undocumented.
yeaaa... sometimes I'm impressed and slightly scared that we were able to get Engineering degrees with this project... A lot of the documentation is plain wrong. Plus, we were mostly software guys so in the hardware spectrum we stuck with what we knew. I believe we did add some decoupling to the power supply but that did not solve the issue, I will retest once the thing is up and running again. I figured in the worst case, I could reset the lcds after each run(but I cant imagine we didn't think of that initially)
I do like your idea of the voltage divider... seems like that would simplify a lot of my input logic.
I will try to get to this soon, I'm hoping to have it working by holoweenish.