GMU:DIY Bio: doing things with biology/Sirin Unmanee/16.01.2019 : Electric Potentials

I attempted to capture the electric potentials from the organism that I'm cultivating, using the Arduino. My aim is to differentiate the number from each organism and find a possibility to use that number to create different visuals.
(reference : Martin Howse, Radio Mycelium [1] )

At the beginning, I captured the electric potentials from my hands to set a control parameter, the number is around 830-860, but mostly is around 840.

16.01.2019 electric potentials from my hands

Then, I tried with three different organism which are bacteria, bread's mold and Kombucha's mold. The problem is the organism cannot be separated them from the medium, so there is also an electric potentials from it. However, I tried to barely touch the medium with the wires.

I don't notice a significant difference between them. All the numbers are around 793-800, the bacteria had the most electric potential, followed by white mold from Kombucha and bread's mold respectively.

1. Bacteria

16.01.2019 electric potentials from bacteria

2. Bread's mold

16.01.2019 electric potentials from bread's mold

3. Kombucha's mold

16.01.2019 electric potentials from Kombucha's white mold