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.

To do this in Arduino/C code, a new intermediate position for the servo is specified for each main loop until it reaches the final position.

Servo moves smoothed - this could be an interesting one if you work with robotics. And it is flagged by the Arduino team.

With just access to a printer, a few cheap-as-chips servo motors, an Arduino, and some nuts and bolts, you could be hacking together robot walkers within a few hours of starting!

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Beyond basic electronics, Arduino at Heart can also be used to prototype robots, said Paul Rothman, director of research and development at LittleBits. The servo motor can help build a moving ...