How would one measure many (20-100) small voltages in the 0-80mV range with an Arduino? I will need to amplify them and put them into the ADC. But i also need to switch between them. I want to measure the lot in about 1 sec if possible, so an electric solution with no moving parts would be best.
What parts can be used to switch between the different measurement ports?
Additional Info: I want to measure Temperatures (in the range of 0-100 degrees) using Thermocouples (K-Type) for an Experiment I am conducting. I then want to plot that data on the PC. The arduino has an 11-bit resolution; meaning that in theory when I amplify those few mV from the Thermocouples i should (in theory) be able to get about 1 degree of accuracy (i am fine with even around 5 degrees though). I can think of multiplexers being able to do the job, however I have no Idea where to look for them.