I have one of your .net gadgeteer starter kits which I have been using
for a couple of weeks with no problem.
Something on the red USB board just started smoking! The power connector
(12V ) was already plugged in and when I plugged in the laptop, something
blew up. I removed the USB connector immediately and the programme on
the board still runs, and the laptop USB port seems fine with other
devices still. I have not dared plug anything in again. I have not used
anything in any way it was not intended to be used.