SImple Soil Moisture Sensor Circuit

Build a simple soil moisture sensor (no programming required) that you can use for a science project! The sensor also works as a water level detector. Complete written instructions, including a parts list, can be found here: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Elec_p066/electricity-electronics/build-an-electronic-soil-moisture-sensor-to-conserve-water