LEGO Fan.
Not an automata but this little fan is a "cool" project for hot days. (10/24/2008)

Basically, the RCX is used only to provide power. A program can be done to control the speed of the fan, but I didn't even tried to. I just needed some air. I believe using some solar cells will make this fan a neat project.

As I said before, this is not safe to operate or build as parts can fly away and poke someone's eye or your own one. Also there is no protection or safety circuit, so it will work regardless there is a failure. Do not build this project, this posting is just to show you how I made my own Lego Fan.
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