This document describes a solar tracker device that orients solar panels towards the sun for maximum efficiency. It discusses the need for solar trackers to increase solar panel output. The working principle is that light sensors detect sunlight intensity on the panel and a motor rotates the panel towards the stronger light to maintain optimal alignment with the sun throughout the day. Key components are the solar panel, sensors, microcontroller and motor. Benefits are maximizing solar energy capture while disadvantages include reliance on weather conditions.

1. PREPARED BY
SOURABH SINGH(1505231046)
AJEET KUMAR RAM(1605231902)
VIPUL AGRAWAL (1505231052)

2. CONTENT
 INTRODUCTION
 WHAT IS SOLAR TRACKERS
 NEED OF SOLAR TRACKERS
 CIRCUIT DIAGRAM
 WORKING PRINCIPLE
 HARDWARE COPONENTS
 ADVANTAGES
 DISADVANTAGES
 APPLICATIONS
 CONCLUSION

3. INTRODUCTION
 Renewable energy solutions are becoming popular.
 Maximizing output from solar system increases efficiency.
 Presently solar panels are of fixed type which lower the efficiency.
 Maintaining vertical direction between light and panel maximizes
efficiency.
 Solar panels are used to convert the light energy into the electrical
energy.

4. WHAT IS SOLAR TRACKER?
A Solar tracker is a device
used for orienting a solar
photovoltaic panel or lens towards
the sun by using the solar or light
sensors connected with the
machine ( ex: stepper motor, servo
motor, gas filled piston ).

5. NEED OF SOLAR TRACKER
 Increase Solar Panel Output
 Maximum efficiency of the panel
 Maximize Power per unit Area
 Able to grab the energy through
out the day.

6. DIFFERENT TYPES OF TRACKERS
Single axis tracker
Dual axis tracker
Passive (Gas) tracker

7. Active Tracker Open loop Tracker

8. CIRCUIT DIAGRAM

9. COMPARISON OF SOLAR
ENERGY

10. WORKING PRINCIPLE
 The Sun tracking solar panel consists of two LDRs, solar panel and a servo motor
and ATmega328 Micro controller.
 Two light dependent resistors are arranged on the edges of the solar panel.
 Light dependent resistors produce low resistance when light falls on them.
 The servo motor connected to the panel rotates the panel in the direction of Sun.
 Panel is arranged in such a way that light on two LDRs is compared and panel is
rotated towards LDR which have high intensity.
 When the intensity of the light falling on right LDR is more, panel slowly moves
towards right and if intensity on the left LDR is more, panel slowly moves
towards left .In the noon time, Sun is ahead and intensity of light on both the panels
is same.In such cases, panel is constant and there is no rotation.

11. COMPONENTS USED
 Solar panel
 ATmega328 Micro Controller
 Light Dependent Resistor (LDR)
 Servo Motor
 16MHz Crystal
 Ceramic Capacitors
 Push Button
 Breadboard
 Cardboard
 Connecting Wires

12. SOLAR PANEL
 Its made up of a number of solar cells connected in series internally
convert solar energy to electricity.
 Based on photo voltaic effect.
 Photo voltaic effect produces a change in electrical characteristics
when light is incident upon it.

13. LDR SENSORS
 A high resistance semiconductor whose resistance decreases with
increasing incident light intensity.
 When light falls on such a semiconductor, the valence electrons
receive the light energy incident and jump to the conduction band.
 The conductivity of the device increases, decreasing its resistivity.

14. SERVO MOTOR
 Its an electromechanical device which converts digital pulse inputs
to incremental shaft rotation.
 Used for precision positioning control applications.
 Its controlled by a series of electromagnetic coils.
 To drive the servo motor, a PWM Signal must be provided to its
 control pin and hence Pin 17 (which has PWM) is connected to the
control pin of the servo motor.

15. ATmega328 Micro Controller
 ATmega328 is an AVR family micro controller.
 It is based on advanced RISC architecture.
 It is an 8-bit controller.
 It has 32K Bytes of Programmable Flash memory.
 1K Bytes of EEPROM.
 2K Bytes of SRAM.
 It has 23 programmable I/O pins.

16. ADVANTAGES
 The solar energy can be reused as it is non-renewable resource.
 This also saves money as there is no need to pay for energy used
(excluding the initial setup cost).
 Helps in maximizing the solar energy absorption by
continuously tracking the sun.
 Eco-Friendly

17. DISADVANTAGES
 Solar electricity is not available at night and is less available in
cloudy weather conditions. Therefore, a storage or complimentary
power system is required.
 Although solar energy can be saved to batteries, they are heavy and
occupy more space and required to change time to time.

18. APPLICATIONS
 These panels can be used to power the traffic lights and streetlights
 These can be used in home to power the appliances using solar power.
 These can be used in industries as more energy can be saved by
rotating the panel.

19. CONCLUSION
 The invention of Solar Tracking System helps us improve the
performance of PV solar system in a simple way.
 Used relative method of sunlight strength.
 Improved the utilization rate of solar energy and efficiency of
photovoltaic power generation system.