Sun tracker with sensor — photovoltaic cell

The paper presents a technical solution for one-dimensional (east-west) solar panels managing as two photovoltaic cells are used for the sensor. The photovoltaic cells are placed at an angle of 45 ° to each other on the surface of the panel. If the difference between the measured radiations by the cells is greater than 5%, the corresponding relay is activated and the panel rotates. The proposed solution is simple, its parameters can be easily changed and can be implemented with the Arduino microcontroller. It provides a rapid reaction to increase the effectiveness of the solar panels under fast changing environmental conditions. The implementation and experimental results are also presented.