I'm new on this forum. French and novice in electronics. As i'm not sure how the breadbroad works in terms of connection i tried a circuit with a led. I'm affraid that a did a short circuit a something like that as my adruino UNO does not communicate anymore with my PC. There is also no more led light on the UNO as previous. Please see the picture to see what i did.
I suppose i had to add a resistance ? is the UNO dead or could i do something to repair ?