I am working on a project where we have to measure resistance of ice cores. As far as I understand the arduino will measure voltage and will use a constant current, like a multimeter does. From this I should be able to get the resistance. So I have three questions to begin with: Am I correct in assuming that I can measure the voltage, use Ohm’s Law, and get the resistance that easily? What is the smallest voltage value that the arduino will measure? What current does the arduino use (40 mA, 50 mA,…)? We are going to use a connector that we are designing and we are planning on using the analog inputs so we will measure down all six pins.
Any help is greatly appreciated. Thanks!