want Arduino to wait for a special input ?

x=0
while (x==0) {
x=digitalRead(some pin)
}

RepRap

I am currently writing a report about RepRap at a course I take at university of Oslo(IFI), called INF5078(Open source, open collaboration and innovation). I will post my report here later.

What is RepRap ?
Knock yourself out : http://reprap.org/wiki/Main_Page & maybe even join :-)

Smart idea :-) MakerLegoBot ...

I love the idea ... it is Lego, you can break the problem into small Lego parts which are easily detectable and measurable :-) It's just perfect to make a 3D maker out of the idea, which is of course done here :-)