Docedison:
@ zoomKat... that suggestion is a given and is discussed in the part of the thread you didn't read... Thoroughly discussed, I might add.
Bob
Well, maybe you read a little lightly. I've read all the post and none seem to discuss the elimination of the 0v-5v voltage range not being used, from the input to the ADC process (why keep a 0v-5v dilution factor in the voltage range of interest?). The below post discusses using a multiplexing chip that can use up to 15v input, but no solution of using a chip rated for only 5v. 