Hi,
My arduino Uno has burned the ATmega16U2, so I find a way to dowload the sketches.
I used a USB to UART TTL converter (CP2012).
It´s very simple, when show "Uploading..." press the Reset button on Arduino.
This is the connections:
CP2012 ARDUINO
GND------------GND
+5V-------------5V
TXD-------------PIN0 - RX
RXD------------PIN1 - TX
I made a search and don't find anything similar.
Hope being usefull
