The project aims in designing a system which is capable of detecting moisture level in the soil and capable of taking the decision of switching ON/ OFF water pump.   The system makes use of a comparator. The output from soil moisture detecting probes sensor is fed to comparator. The comparator will continuously compare output from probes and reference voltage and generates logic low or high. The output generated from comparator is used to drive a water pump through an electronic switch Relay.  

The major features of this project are: 

1. Automatic switching of Water pump.
2. Simple electronic circuit.

  The major building blocks of this project are:  

1. Regulated Power Supply.
2. LM358 COMPARATOR.
3. Soil moisture sensor.
4. Relay with driver.
5. Reference voltage (Potentiometer).

   

Regulated Power Supply:

             

Block Diagram:

 

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