This video demonstrates how to use an Arduino Mega 2560 instead of an Arduino Uno for use as as DCC++ Base Station. The Mega 2560 offers more memory and additional digital I/O pins that help extend the functionality of the Base Station.
NOTE: There has been an update to the Mega 2560 version of the software posted to GitHub since this video was uploaded. In order to allow for the addition of an Ethernet Shield, the Program Track signal generation has been changed from Pin 4 to Pin 2. This means that with the most recent version of the software you should use a jumper wire to connect Pin 2 to Pin 13 (NOT Pin 4 to Pin 13 as indicated in the video).