I need to measure around 50 - 100 analog sensors (resistors). This poses two challenges:
Arduino has fewer analog pins. I'm targeting something small like arduino Mini or Nano, which can have up to 8 analog pins. The solution for this could be several multiplexors like this one. Is there a better option? Is this the best way to read so many analog sensors with Arduino? I am thinking also in several arduino mini talking through wifi / bluetooth with the main one which would also aid with Problem #2.
There would be a lot of cables for this setup, and I need to keep it all as flat and flexible as possible. So I was thinking of some kind of adesive copper conductor, paper printed circuit or plastic. The thing is that it would become difficult to create if I do it myself. What would be the easiest way to achieve a multi-track, flexible circuit for substituing Arduino cables?