Thanks Ray,
I will check my circuit first.
The components comes from Farnell. As far as I know the same kind of shop than Newark. (element 14).
But I set it up right?
-UNO connect to pc - upload sketch - UNO disconnect - connect usb-circuit - open excel?
Otherwise you have two usb-ports in use. So to who should Excel listen?
I will keep you informed.
Gr.
Johan