The project aims in designing a smart irrigation system which is capable of detecting moisture level in the soil and capable of taking the decision of switching ON/ OFF water motor using LM358IC. Automation is the most frequently spelled term in the field of electronics. The hunger for automation brought many revolutions in the existing technologies. The system makes use of a COMPARATOR IC. Soil moisture sensor, water motor along with relay are interfaced to the comparator. The comparator will continuously compare output from soil moisture sensor. When there is no moisture in soil then comparator will turn ON the water motor through relay. There is sufficient water in soil, comparator will turn OFF the water motor through relay automatically. Here relay works as a switch to ON/OFF the water motor. POT is used to gives the reference voltage.        

The main objectives of the project are:

• Automatic Soil moisture sensing system.
• Automatic switching of Water pump.
• The system avoids the need of a human being at field.

           

The major building blocks of this project are:  

• Adapter power supply.
• LM358 Comparator.
• Soil moisture sensor.
• Relay with AC water motor.
• POT(potentiometer)

       

       

video: