DIY an Arduino Powered Automatic Watering System

By on July 12, 2018
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If you are planning your holidays, for sure this project will help you to solve a big deal: watering your plants.

Also if you aren’t going on holidays, this system can avoid you to waste time in hand watering. In fact it is designed to take the hassle out of watering, by watering only when the soil becomes dry, all without manual intervention.

All you need to build your automatic watering system is:

  • Arduino UNO & Genuino UNO
  • 1/4” Carbon Arc Gouging Rods
  • Solenoid Valve
  • IRF640 Mosfet
  • 220 Ohm Resistor
  • 680 Ohm Resistor
  • Jumper wires (generic)
  • 1N4007 – High Voltage, High Current Rated Diode

This is how the maker explain his creation’s functionality:

“Soil moisture is read using an Arduino Uno, via a pair of carbon (graphite) electrodes inserted approximately 10 cm into the ground. The moisture level is read as a voltage, by passing a current through the rods and the soil. As the soil moisture decreases, the voltage read increases, activating a valve to water the area. On the contrary, as the soil becomes moist enough, the conductance increases, the voltage across the rods decreases, and the valve is turned off.”

To find out more, please refer to the page.

About Luca Ruggeri

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