The system is an automatic irrigation system where the irrigation pump is operated from solar energy. It becomes tedious to manually operate the irrigation system and keep monitoring the water level of the soil. Hence the system uses solar power by using photo-voltaic cells instead of commercial electricity. The project requires an op-amp IC that acts as comparator and senses the soil moisture level. To measure the soil moisture content two copper wires are inserted into the soil at a certain distance. The sensors send the data to microcontroller which is interfaced to relay driver IC that initiates relay to operate pump motor to switch ON/OFF and the status of the pump is displayed on a LCD screen.
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