1. Solar tracker
2. Aim of the project
3. Hardware used
4. Block diagram
5. Hardware description
6. Power supply
7. Microcontroller AT89S52
A solar tracker is a generic term used to describe devices
that orient or align various payloads toward the sun.
Example for payloads are photovoltaic
panels, reflectors, Collectors, lenses or other optical devices.
The system focuses on the optimization of the electric energy
produced by photovoltaic cells through the development of a
AIM OF THE PROJECT
To follow the sun from dawn, throughout the day, till
evening and again from dawn next day.
The driver will have to position a photo-voltaic panel to the
best angle of exposure to sunlight for collection of maximum
TRANSFORMER (230 – 12 V AC)
VOLTAGE REGULATOR (LM 7805)
• 8K Bytes of In-System Programmable
(ISP) Flash Memory
• 4.0V to 5.5V Operating Range
• Fully Static Operation: 0 Hz to 33 MHz
• Three-level Program Memory Lock
• 256 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Three 16-bit Timer/Counters
• Eight Interrupt Sources
• Full Duplex UART Serial Channel
• Interrupt Recovery from Power-down
• Fast Programming Time
ULN is Relay driver application.
The ULN2003 is a high voltage and high current
Darlington transistor arrays.
It consists of seven NPN Darlington pairs that
features high-voltage output with common-
cathode clamp diode for switching inductive
The collector-current rating of a single
Darlington pair is 500mA.
The Darlington pairs may be paralleled for higher
Solar tracking systems continually orient photovoltaic
panels towards the sun and can help maximize your
investment in your PV system.
One time investment, which provides higher efficiency &
flexibility on dependency over other sources.
Tracking systems can help reducing emissions and can
contribute against global warming.
Bulk implementations of tracking systems help reduced
consumption of power by other sources.
It enhances the clean and emission free power
Initial investment is high on solar panels.
It’s a bit of difficult for servicing, as the tracking systems are
not quite popular regionally.
Moving parts and gears which will require regular maintenance.
May require repair or replacement of broken parts over a long
Can be used for small & medium scale power generations.
For power generation at remote places where power lines are not
For domestic backup power systems.