1. Auto-Irrigation System FEEDFROM SOLAR POWER
INVERTER
GroupMembers: Under The Guidance of:
 Hemant Kumar Pattnaik Er. Deepak Ranjan Nayak
 Jagajyoti Jagannath Jena Department of EEE
 Jnana Ranjan Swain Silicon Institute of Technology,
 Karishma Besra Bhubaneswar
 Kashyapi Rath

2. INTRODUCTION
 Indian agriculture is dependent on the monsoons which is
not a reliable source of water. Therefore there is a need for
an irrigation system in the country which can provide
water to the farms according to their soil types.
 The auto irrigation system represents the prototype design
of soil-moisture sensor , timer integrated circuit and power
relay circuit to turn on or off pump according to the
dryness and wetness of soil and the electricity required for
this system is supplied through a technology associated
with solar energy called Solar Photovoltaic (SPV)

3. Solar panel
Charging
circuit
Relay and
pump
Timer circuit
inverter
Displaying
unit
battery
Sensor
circuit
Block diagram

4. COMPONENTS REQUIRED
 SOLAR Panel
 LM 317 voltage and current regulator
 ACS 712 20A current sensor
 IN4007 diode , resistors , capacitors
 Zener diode
 Atmega 328 micro controller
 20 *4 I2C LCD
 LM324 OPAMP
 IC Timer 555
 Relay : 220V/3-4A
 Submersible Water pump
 LED
 FUSE

5. Solar panel operation
Specification:
• Amorphous
• P max=50 W
• V(at max power)=17.7V
• I (at max power)=2.83A
• Voc=21.4V
• Ioc=3.28A

6. CHARGING CIRCUIT

7. ACS712 CURRENT SENSOR
• The Allegro ACS712 current sensor is based
on the principle of Hall-effect.

8. ACS712 CURRENT SENSOR
 Current Range: + 5Amp
 o/p Sensitivity:185mV/A
 At 0 current :Vout=Vcc/2

9. LM 317 VOLTAGE REGULATOR
 Range:
• i/p Voltage: 3-40V DC
• o/p Voltage:1.2-37V DC
 R1:Program
register=240Ω
 R2:Set register=2.5kΩ
 o/p Voltage=14.27V

10. LM 317 CURRENT REGULATOR
• R1=1.5Ω
• o/p Current=0.833Amp
• o/p Power=1.014 Watt

11. inverter
battery
solar
ON
OFF
+
+
+
-
-
-
Solar & battery
Inverter& battery
Switching circuit

12. aUTOmatic irrigation system
-
+

13. IC TIMER 555
i
n
v
e
r
t
e
r

14. CONDITIONS
State Op-amp
O/P
Timer
I/P
S
state
R
state
Q
FF O/P
Q’
FF O/P
Transistor
state
Timer
O/P
Dry 0V 0V 1 0 1 0 OFF 1(12V)
Wet 12V 12V 0 1 0 1 ON 0(0V)

15. RELAY (JQC-3F(T73))
• A relay is an electrically
activated switch.
• The usage of Relay is to allow a
low DC voltage circuit to switch
ON or OFF a high voltage (AC
or DC) ckt without direct
connection b/w them.

16. APPLICATIONS
Irrigation In Agricultural Fields.
Irrigation In Gardens, Parks.
Very Efficient For roof-top gardening.

17. FUTURE EXTENSION
 The working of project is basically dependent on the
output of the soil-moisture sensors. Whenever there is
need of excess water in the desired field(RICE crops) then
it will not be possible by using sensor technology. For this
we will have to adopt the DTMF technology. By using
this we will be able to irrigate the desired field & in
desired amount.
 Water level indicators or Auto fill sensors can be used to
regulate the inflow of water to the storage tank.

18. CONCLUSION
 The aim of our project is to minimize this manual
intervention by the farmer as there is no un-planned
usage of water as well as electricity, a lot of water and
energy is saved from being wasted as the irrigation will
take place only when there is not enough moisture in the
soil and the timer decides when should the pump be
turned on/off.
 This also gives much needed rest to the farmers and also
relieve them from electricity to turn on the motor for
irrigation, as they don’t have to go and turn the pump
on/off manually.

19. REFERENCES
 http://www.triplepundit.com/2011/08/solar-farming-
potential-india/ - Solar Farming
 http://en.wikipedia.org/wiki/Solar_cell
 http://www.planetarypower.com.au/solar_panels.htm
 http://www.earthtimes.org/energy/solar-cells-
future/1403/ Element14 – to look up devices, ICs
 Physics of Solar Cells- A Text for Undergraduates, J
Nelson
 http://www.instructables.com/id/How-to-make-any-
home-appliance-into-a-solar-electr/?ALLSTEPS

20. THANK YOU !!