Measure plant pot amperage production My son is working on a school project, He wants to measure microbiological interaction with soil and plant.
In his protocol, he has to measure the amperage of the soil. I would like to help him with some automation and Arduino.
But I can't find a module that does this work for him.
Have you got some resources or maybe a small and easy PCB to achieve this?
Firsts measurements tend to reveal that microbiological product small ampere, near the micro/nano ampere.
Edit : I think I don't explain correctly what we are trying to achieve :
The plant rejects sugar through its roots, then the bacteria eat the sugars and these bacteria release electrons in the medium, and it is this phenomenon that we want to measure.
It is the bacteria that produce the electrons because a whole test protocol has been put in place to ensure the phenomenon.
So we want to monitor this electron production and then make some and correlations analyze to see if it's benefit to the plant or not.
I think he wants to measure the resistance of the soil. I saw many projects (I was a science fair judge) that did it with an ohm meter or variation thereof. They would have several samples of soil and add nutrients to it, generally with water. Salt was the best conductor. Similar tests were performed using Ph as the measurement. An Ohm meter passes a current through the DUT (Device Under Test) and measures the voltage drop to determine resistance, maybe that is where amperage came from. I am guessing this is maybe about a seventh grade project. More information always helps.