Thanks for all your advice!
Ouch. Seems quite advanced to get all those inputs?
But I am able to get 6 analog from one UNO?
What does "so there is only one ADC that is used by all analog pins" mean?
I've read about Mega now... "54 I/O (incl 4 HW UARTs, 14 PWMs, I2C bus), 16 Analog inputs"
Shouldn't the Mega do the job?