For this year's holiday decorations, I wanted to do something more than a circle under the tree that I have been doing the past years. I started thinking about it in early fall so there was plenty of time to design something new (or plenty of opportunity to procrastinate past the time when anything new could be designed).  My first thought was a simple point-to-point trolley or street car. I've seen plenty in displays or builds in the club so I could envision what I wanted. It also seemed like a pretty simple Arduino project to build. But, I don't have a trolley. And looking on line, even used ones were a bit expensive for a "maybe-I'll-get-to-it" project.  My wife liked the idea and found a box car transport for Santa's reindeer that she gave me for my birthday. We could use an existing engine and pull it along. She has a small LGB engine that would be a great size and it still runs on DC so easier to program using the Arduino. My plan was to put a senso...