Windows 7 64 bit, Arduino Uno
I'm a brand new newbie: Arduino arrived this morning.
Everything was working fine: plugged in Arduino, it appeared on Dev Manager, I installed the drivers, ran BLINK, changed the code, re-compiled, uploaded, all fine.
I had three COM ports, 2 and 3; Arduino was on 5.
Downloaded a new piece of code (http://ardx.org/CODE02
), compiled, uploaded, all worked fine.
Changed code ... went to upload ... COM5 had vanished, and there's no sign of the Arduino in Device Manager.
I've tried resetting the Arduino (several seconds), unplugging, replugging, and I've restarted Windows. Whatever I do ... no Arduino in Device Manager, no COM5 port, and upload does nothing.
But the Arduino is sitting on my desk, drawing power from the USB port, with 8 LEDs blinking on and off.
HELP! Please ;o)