This solar tracker system uses the Arduino UNO board, a servomotor ... make the electrical part is the board, one servo, 2 LDRs and 2 x 10K resistors. Usually the servo has a yellow wire that is used ...

The project uses an Arduino Uno R3, Arduino Mega 2560 ... the Arduino CNC shield and Arduino code for controlling the to DC servo motors have been kindly published to the Instructables website.

Software scalability is also supported on the new board, allowing easy upgrades for projects made with UNO R3 or Leonardo. Requests from the Arduino community see the USB port upgraded to USB-C ...