Ah ok! Thanks for that bit of clarification, it makes a world of a difference, yes, you can use the breadboard for that, but - based on my own experience - if you want to actually use an ADC on a breadboard you're going to be in for a world of hurt as soon as you exceed some very low threshold frequency of updating and you're going to be fighting all kinds of weird bias effects. The parasitic capacitance of those breadboards is just terrible.