Short circuit and high voltage
Hello there, I am new to Arduino and electronics in general, so I hope you can bear me :confused: :).
So, what happens if I sent a high voltage from an I/O pin directly to the ground pin? Could this damage the board even at 40mA? I understand the output of that pin is from the microprocessor … but who is in danger here? the microprocessor, the busses, or what? I read processor basics ONwww(dot)kynix(dot)com/Blog/Microprocessor-Tutorial-Basics-and-Its-Applications-with-Examples.html but I am still confused.
Also, why the short circuit is dangerous? Is it because the current is too high and it should be consumed a bit, then travel back to the ground or I get the whole idea wrong.