--> Automatic Plant Irrigator

The Project presented here waters our plants regularly when you are out for vocation. The circuit comprises of sensor parts built using op-amp IC LM324. Op-amp’s are configured here as a comparator. Two stiff copper wires (for one sensor) are inserted in the soil to sense the whether the Soil is wet or dry. The Microprocessor was used to control the whole system. It monitors the sensors through the programmable peripheral interface (PPI) IC 8255. When more than two sensors sense the dry condition, then the Microprocessor will switch on the motor and it will switch off the motor when all the sensors goes wet. The Microprocessor does the above job by receiving the signals from the sensors through the PPI, and this signals operated under the control of software which is stored in ROM. We are using the 8 bit Microprocessor 8055 and the programmable peripheral interface IC 8255. 

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