pmw dimming 12v diagram issues

Hi. I ma very new to this, but I am trying to do some PMW dimming of a 12v led stripwith a transitor.

I have been working from this tute, but I think that there is something wrong with the diagram

As there is no output from the emitter surely this will never work? Or is it just me.

http://itp.nyu.edu/physcomp/uploads/arduino_transistor_lamp.png

It looks like wires have been missed out of that diagram.

If you take a look at the whole page:

http://itp.nyu.edu/physcomp/Tutorials/HighCurrentLoads

The missing connections are there on the other diagrams, but gone on that particular one, which is a mistake. Look at the previous diagrams and you should be able to complete the circuit.

The ULN200xx Range of darlington arrays are nice and easy to use

cool. i thought so. Thats annoying, I spent hours testing everyother part of the code and components wondering why it wasn't working(

The clue is that it is very rare that a circuit that uses a three terminal semiconductor has one connection un connected.