The document presents a dual axis automatic solar tracker designed by students to increase solar panel efficiency. It uses microcontrollers, light dependent resistors (LDRs), and servo motors to sense the sun's position and automatically rotate the solar panels accordingly. When an LDR senses a drop in sunlight, it sends a signal to the microcontroller. The microcontroller then outputs a signal to rotate the motors and align the panels toward the sun. The design uses two servo motors for horizontal and vertical rotation. Forex sheet material is used to construct the axially symmetrical panel mount. Circuit diagrams and block diagrams are provided showing the system components and information flow. Test results show increased maximum power capture over fixed panels at different times of day.

1. MAULANA AZAD NATIONAL
INSTITUTE OF TECHNOLOGY,
BHOPAL
PRESENTATION OF MAJOR PROJECT
DUAL AXIS AUTOMATIC SOLAR TRACKER
FACULTY COORDINATOR
DR. MANISHA DUBEY
HOD, ELECTRICAL
PPPPPPPPRESENTED BY:
JITENDERA GOYAL(161113072)
NAMAN BANSAL(161113086)
ADARSH TOMAR (161113059)
HARSHIT GUPTA(161113043)

2. OBJECTIVE
To develop a mechanism that can mount the solar modules and move them in
accordance of the motion of sun to reduce the misalignment and hence
increase the efficiency.

3. PRINCIPLE AND WORKING
FUNCTIONING:
1. Auto – tracking control system composed of microcontroller ( Arduino ), sensors, PV cells, servo
motors and power supply system.
2. Panel detects the sun light strength to sensors.
3. The sensors i.e, LDRs are arranged in such a way that it gives signal to microcontrollers when any one
or more than one of the LDRs do not face the sun.
4. A high resistance semiconductor whose resistance decrease with increasing light intensity.
5. The sensor output is given to the microcontroller which compares it and produces an equivalent
output so as to rotate the motor and align the panel in the direction of the sun.
DESIGN:
1. There is two servo motors used in the model, one control the rotation in horizontal plane while the
other control the rotation in vertical rotation.
2. The material used for making the current model is made up of Forex Sheet.
3. The model design is kept axially symmetrical as possible as it can be done so that the module mount
do not bend due to its own weight.
4. The four LDRs are positioned in different partitions so that at only certain angles(approaximately 90),
the light falls over them.

4. CIRCUIT DIAGRAM

5. BLOCK DIAGRAM

6. RESULT
Observable data relation between the maximum power and the time time intervals