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. Here https ...

[Frank Herrmann] had an interesting idea to turn a geared DC motor into a servo motor ... motor driver’ interface pins hooked up to the motion controller upstream. The Arduino source for this ...

His test setup uses an Arduino to drive servo motors on the receiving end of the hardware. You can’t do everything with Xbee, but the sender is where this concept comes into play. [Stephen ...