Is the old forum not working anymore? I just tried it, it brings up the current forum top level.
@fenix8k:
"pin 13 thats already have a resistor" INCORRECT!!
Pin 13 may have a resistor in series with an onboard LED, it does not have one to limit current to external devices.
On the most recent Uno, the on-board resistor/LED is not even driven by pin 13; pin 13 drives a buffer that drives the LED.