Been using Getting Started with Arduino. The last sketch I uploaded was Dimming the led with a variable resistance UV sensor. In place of the UV sensor I used a 300 ohm to 1.2kohm pot.
I was using linux for my sketches and now the DIM sketch isnt even in my sketchbook anymore so i cant show you.
I uploaded the sketch and the led came on connected to p9 but didnt dim. Went to bed and went to use it the next afternoon and its no longer recognised by Linux or windows on my desktop or laptop.
There is a sticky at the top of the forum. It says that if you are posting on the Programming section, you post your code. Without your code, how can we possibly help you?
Without your code, you can bump until the cows come home, and you'll just be wasting your time, and ours.
I think what he is trying to say is this is not the place to ask that question, which comes up quite frequently, for many different reasons.
EDIT: You will probably do better in 'Installation and Troubleshooting.'