This solar tracker system uses the Arduino UNO board, a servomotor, 2 LDRs and 2 resistors to rotate the solar panel towards the Sun or a source of light.

Mysoltrk solar panel Sun tracker Mysoltrk operates using a set of two straightforward, yet sturdy actuators, each one constructed around a 6V 30RPM geared DC motor.

The brains are an Arduino glued to a large amount of solar support electronics and the online energy monitor component is covered by an ESP8266. The construction works quite well.