I've got a little problem, when I connect my UNO to PC, the "L" LED doesn't turn ON, it is OFF. When I disconnect GND wire it turns ON, it never did before. Can someone explain me that ?
So apparently it will continue to blink when I am operating a circuit unless I connect the pin-13 ??
pinMode(13, INPUT_PULLUP); // L-LED should be "always ON"
pinMode(13, OUTPUT); // L-LED should be "always OFF"