Introduction

As time goes by, people are getting more advanced, new technology is coming in the market, everything is getting automated. I didn’t like waking up every morning to water the plants. So I thought that if this task could be automated, then it would be great. But I didn’t have any Arduino or soil moisture sensor. After some thought, I decided that I will make the project without Arduino and ready-made soil moisture sensor. And finally, I made the project with some common electronic components at home. This circuit can check the soil moisture and turn the water pump on or off automatically. The circuit is very easy to make, if you are looking for a project for your school or college science project then you can make it, because it is very easy to make and very cheap to make. So let’s see how to make this project.

Required component’s :

IRFZ44N Mosfet

3V Water Pump

10K Resistor

50K Potentiometer

3.7v Battery

Switch

22 to 24 Gauge Copper Wire

Small piece of Zero PCB (Optional)

Project Overview

The soil moisture sensor always checks the soil moisture, whenever the soil moisture becomes less than the moisture set in the system, the IRFZ44N Mosfet turns on the water pump. When the soil moisture becomes more than the moisture set in the system, the water pump is turned off.

Circuit Diagram :

Soil Moisture Sensor making :

At first, we need to take two pieces of copper wire and I removed the enamel coating from the wires

Then we need to take a small piece of Zero PCB. (If you don’t have Zero PCB, you can use a small piece of plastic instead of Zero PCB).

Then we’ve to solder two copper wires on both sides of that zero PCB (If you’re using a piece of plastic instead of Zero PCB then you need to glue the two copper wires to both sides of the plastic)

Now our soil moisture sensor is ready to use

Then we have to make the circuit. First of all I took the IRFZ44N Mosfet, you can see the pinout of the mosfet 1st pin is Gate, 2nd pin is Drain and 3rd pin is Source.