Minor Upgrade to the Pi February 17, 2013July 26, 2014 by Michael Carnell, posted in DCC and Computer Control, Trains, Model RR, Hobbies My Raspberry PI is now safe and sound in its new case. And it has a new 16 gig class 10 SD card! Oh, and heat sinks on the three main hot spots. Yes, I am having fun. The USB wifi adapter for it should be here Tuesday or Wednesday.