TRACKING SUN EFFICIENCY IMPROVED:Sun tracking solar cell modified

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Normally solar cells generate less energy since the sun moves in an elliptical path and only directly illuminates the cell for a few hours. To overcome this, a model was constructed to place a solar cell on a mechanism that can move in an elliptical path tracked by light intensity sensors, maximizing direct sunlight exposure. A PIC microcontroller controls the motor movement based on sensor output to efficiently track the sun. An LCD display shows the generated voltage and current.

Education

SOLAR PROJECTS-Sun
tracking solar cell
Normally solar cells are placed in a ground in one direction

only. But sun moves in a elliptical path. So only few hours the

sunlight falls into the cell. During the rest of the hours the

percentage of Sunlight, which falls into the cell, is very less.

Which results in less amount of energy generation.

To overcome this problem we can construct a model where we

can place the solar cell in it and which can move in elliptical

path .To track the sunlight. This is achieved with the help of

light intensity sensors. The sensors are fixed into the model in

an elliptical path. So depending on the sunlight the sensors

output differs. So according position the solar panel, which

results in good efficiency. (i.e.).the solar cell can produce energy

by tracking the sunlight with the help of sensors and

mechanical model. The Movement is controlled by a PIC

Microcontroller. Also we have an LCD Display to Show the

Generated Cell Voltage and Current.

Mechanical arrangement:

Motor
Solar cell

Sensors-4 Sensors-3
Sensors-2

Sensors-5 Sensors-1

Block diagram:

Light
intensity
sensors

Potential
Divider

PIC Microcontroller Power
PIC 16F877 Supply

Opto Opto Opto Opto
Coupler Coupler Coupler Coupler

Pre Pre Pre Pre
Driver Driver Driver Driver

Signal Power Power Power Power
Conditioner Driver Driver Driver Driver
Circuit

Solar Cell Stepper Motor

Mechanical Model

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