'The Sunflower' is an Arduino based solar tracker which will increase the efficiency of the solar panel while charging.

In modern solar tracking systems, the solar panels are fixed on a structure that moves according to the position of the sun.

Let us design a solar tracker using two servo motors, a light sensor consisting of four mini photocells and Arduino UNO board.

Assembly of the Pan Tilt

Follow the steps in the images above and assemble the parts.

Remember: Use rubber spacers when using the M1x6.


Stack the I/O Expansion Shield on the Arduino.

  • in shield.
  • in shield.
  • in breadboard.
  • each photocell.
  • 10k Ohm resistor in series.

Fixing and Testing

  • Fix the Solar Panel on a cardboard and paste it on the face of upper servo.
  • Take out all the wires and give them a play so as to move about 180 degrees.
  • Put the system on a stable platform.
  • Upload the code and test it with a bright LED or a bulb.
Naman Chauhan