Dual Axis Solar Tracker With Fuzzy Logic Method

The aim of the research is to fix the solar trackers that use LDR as input were losing tracking due to bad weather. In addition, solar trackers that use the calculation of the sun's movement cannot adapt to the environment when the weather is bad. As a solution to these problems, a two-axis solar tracker was made using fuzzy logic. The north south axis is moved once per day. The tilt angle of this axis is based on the calculation of the declination angle and the longitudinal position of the project installation. The east west axis will move every 10 minutes. The tilt angle of this axis is determined by the fuzzy logic output. The first input of this fuzzy logic is the difference between the west LDR and the east LDR. The second input of this fuzzy logic is the difference between the calculated east-west angle and the actual east-west axis angle. The output of fuzzy logic is the speed of the actuator and the direction. The actuator is two stepper motors. This project uses Arduino Mega as a data processing center and ESP-12E to send data to Blynk. The ESp-12E acts as the master while the Arduino Mega acts as the slave. These two modules communicate with the I2C protocol. In conclusion, this solar tracker can follow the movement of the sun and adapt to the environment or weather at that time.