Others have power supply problems related to a power supply (Vin in this case) in conjunction with the usb power.
Take a look at the o-scope displays in reply #6 here.
http://arduino.cc/forum/index.php/topic,100362.0.html
Others have power supply problems related to a power supply (Vin in this case) in conjunction with the usb power.
Take a look at the o-scope displays in reply #6 here.
http://arduino.cc/forum/index.php/topic,100362.0.html