Tank and PH+EC Set Up


for EC: Why don’t you just use stainless electrodes sitting in a small reservoir with a hole in the bottom. A $2 pump could fill this every 5 or 10 minutes (depending on how often you wanted to measure), the measurement could be made and the fluid would then drain away.
for pH: what about the principle of a lemon battery - this uses different electrodes (typically a galvanised (=zinc) nail and a penny(=copper)) to chemically generate a voltage from acidity in fruit. I would have thought this should work for any liquid solution enabling an arduino to measure the voltage for a cheap pH meter. (Obviously you would have to measure the EC first with identical electrodes then correct for changes in the ions in the solution).
$170 for the above probe seems cheap for a large scale commercial project, but ridiculous for any sort of home/school project.


Hi @ToeSmack,
We do have a Getting Started page on the wiki. Currently it mostly contains information regarding germination, but if there are any plant experts out there that want to expand on it, please do! :slight_smile:


@ferguman thought this might be of interest for our Atlas probes/circuits


Hi dgm3333

I like your idea of building cheaper sensors for food computers. The Ardunio code implements sensors as a child class of a common Module class. This allows alternative sensors to be integrated into the FC system relatively easily. If you can come up with a cheap set of PH and EC sensors it would be of interest for integration into the MVP also.


The plantcubed link does not work anymore