Boz:
Can anyone give me examples or explain how the LED on pin 13 can conflict or mess up a project using that pin?The main problem when using pin 13 for external circuit needs is if it is used as a input pin then the device or component driving the signal would have to be able to source enough current when trying to drive the signal HIGH to power the on-board pin 13 led/resistor. I think most designs use a 1k ohm resistor so there would be a 3-4 ma current source requirement for the signal.
What about a status led on a PWM pin what would or could be the loss or conflict?
As long as the pin is used in output mode the fact that the pin has a status resistor/led should not be a problem. As long as total pin current load is kept at around 20-30ma max there should be no problem. If the pin is used as a input pin then same concern as the pin 13 situation above.
I know I have seen problems talked about before but looking for pin 13 in search here is like looking up the word the on the internet.
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