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Presentation OnPresentation On
Capstone Project (Part –I)Capstone Project (Part –I)
(Closed Loop Solar Tracker)(Closed Loop Solar Tracker)
• Renewable energy is rapidly gaining importance as an
energy resource as fossil fuel prices fluctuate.
• One of the most popular renewable energy sources is solar
• Many researches were conducted to develop some methods
to increase the efficiency of Photo Voltaic systems (solar
• This project deals with a microcontroller based solar panel
• Solar tracking enables more energy to be generated because
the solar panel is always able to maintain a perpendicular
profile to the sun’s rays.
Project ObjectivesProject Objectives
Some of the objectives to meet are:
To design an effective sensor array to provide
directional information to guide a major drive system
to track the movement of the sun across the sky.
The drive will have to position a photo-voltaic panel
to the best angle of exposure to sunlight for collection
of solar energy.
To present and run the Solar Tracker during the end-
of-the course presentation.
Solar PanelsSolar Panels
Solar panels are devices that convert light into
electricity. Solar cells or PV cells rely on the
photovoltaic effect to absorb the energy of the
sun and cause current to flow between two
oppositely charge layers.
A solar panel is a collection of solar cells.
Crystalline silicon and gallium arsenide are
typical choices of materials for solar panels.
Solar TrackerSolar Tracker
A solar tracker is a device onto which solar
panels are fitted which tracks the motion of the
sun across the sky ensuring that the maximum
amount of sunlight strikes the panels throughout
Need Of Solar TrackerNeed Of Solar Tracker
Increase Solar Panel Output
Maximum efficiency of the panel
Maximize Power per unit Area
Able to grab the energy throughout the day .
Types of solar trackersTypes of solar trackers
Single Axis Solar Tracker Dual axis solar Tracker
Methods of DriverMethods of Driver
Active Trackers :Active Trackers use motors and gear trains to
direct the tracker as commanded by a controller responding to the
Passive Trackers :Passive Trackers use a low boiling point
compressed gas fluid that is driven to one side or the other (by solar
heat creating gas pressure) to cause the tracker to move.
Chronological Tracker :Chronological Tracker counteracts the
earth's rotation by turning at an equal rate as the earth, but in the
Light Dependent Resistor
(LDR) is made of a high-
It can also be referred to as a
If light falling on the device
is of the high enough
frequency, photons absorbed
by the semiconductor give
bound electrons enough
energy to jump into the
The resulting free electron
(and its hole partner) conduct
electricity, thereby lowering
DC MotorDC Motor
• A DC motor is a mechanically
commutated electric motor powered
from direct current(DC).
• DC motors are cheaper to buy.
• Simple to drive but they need feed-
back sensors to allow control of the
• It is necessary to detect the rotation of
the wheels by means of sensors.
• L293D is a dual H-bridge motor driver
integrated circuit (IC).
•Motor drivers act as current amplifiers since they
take a low-current control signal and provide a
• This higher current signal is used to drive the
•When an enable input is high, the associated
driver gets enabled.
•when the enable input is low, that driver is
Pros And Cons Of SolarPros And Cons Of Solar
Tracking SystemTracking System
• Produces no pollution.
• Solar power produces electricity very silently.
• Chance to harness electricity in remote locations
that are not associated with a national power grid.
• Installing solar power panels in remote locations
is generally much less expensive.
• High initial price of solar panels.
• Repairs and maintenance
• Damage in a storm
• Moving parts and gears require regular
As we know that our country (India) have one of the
great problem of electricity now a day, specially in
ruler areas .electricity is a pillar of any country ,we
just want our project becomes ray of hope of those
People which really deserved it.
Here,Our main aim is to find low cost and accurate
closed loop solar tracker which is fully Automatic .