AUTOMATIC PLANT IRRIGATION

ABSTRACT:

Irrigation is the key to a successful garden. Long gone are the days of manual watering or

relying on a friend to water when you are on vacation or away on business. The Project presented

here waters your plants regularly when you are out for vocation. The circuit comprises sensor parts

built usingAT89S52. Op-amp is configured here as a comparator. Two stiff copper wires are inserted

in the soil to sense the whether the Soil is wet or dry.

The comparator monitors the sensors and when sensors sense the dry condition then the project

will switch on the motor and it will switch off the motor when the sensors are in wet. The

comparator does the above job it receives the signals from the sensors.

A transistor is used to drive the relay during the soil wet condition. 5V double pole – double

through relay is used to control the water pump. LED indication is provided for visual identification

of the relay / load status. A switching diode is connected across the relay to neutralize the reverse

EMF.

This project works with 5V regulated power supply. Power on LED is connected for visual

identification of power status.

This project uses regulated 5V, 750mA power supply. 7805 three terminal voltage regulator

is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac of secondary

of 230/18V step down transformer.

BLOCK DIAGRAM:

POWER SUPPLY:

Power supply to all sections

Soil dry wet sensor

MICRO CONTROLLER

Transistor driver circuit

LCD display

Relay

AC input

Water pump

Step down T/F

Bridge rectifier

Filter Voltage regulator

LED

HARDWARE REQUIREMENTS:

1. Microcontroller

2. Power Supply

3. LCD

4. Relay

5. Transistor Driver Circuit

6. Ac Input

7. Soil Dry/Wet Sensor

8. Water Pump

9. Led

SOFTWARE REQUIREMENTS:

1. keil software

2. ride software

3. handy prog

Advantages:

1. Studies show that drip irrigation systems use 30 - 50% less water than conventional watering

methods, such as sprinklers. So, by using automatic plant irrigation system we can save water.

2. Smaller amounts of water applied over a longer amount of time provide ideal growing

conditions. Drip irrigation extends watering times for plants, and prevents soil erosion and

nutrient runoff. Also, because the flow is continuous, water penetrates deeply into the soil to get

well down into the root zone.

3. Water is delivered where it is needed.

4. Setting and moving sprinklers are not required. A timer delay as per environment can be added

to the system for automatic watering.

5. There is no need to go to fields in the nights to switch on the motor.

6. A drip irrigation system can be modified easily to adjust to thechanging needs of a garden or

lawn. It is an adaptable method.

7. Pollution can be reduced because of more number of plants; we can save our Environment

from pollution.

8. We can have rains at right time due to the improvement of plants.

Applications:

By using this project in real time applications we can reduce the wastage of

power. No need of human effort to switch ON or OFF the water pump.

We used this application in summer seasons by reduce the wastage of water.