The SunnySide Solar Tracker, using Arduino.

Hardware schedule and software for the SunnySide solar tracker.

I build this solar tracker to be as generic as possible, so it could work with all kinds of (self-built) systems. It works with two LDR's or photocells in both horizontal and vertical plain. The LDR's values are periodically being compared. When they differ too much, the servo's correct the position. This one is based on the Arduino.

The weak point at this point is that only small motors work with this one, up to 2 amps.
The files with electronic schedule and script can be found here.