Pancra85:
ok, perfect!
but there is something I don't understand, without the 10K Resistor why the current doesn't goes to GND, even if it has a Resistor it's the only way, right?
Don't quite understand your question, do you mean using only the series resistor and led why is that not a path to ground? If that is your question, is because the led is not biased to be in a conduction mode, it's 'cut-off'. If that is not your question perhaps you could reword it?
Lefty