For a friend, I'm working on a project that will put some electronics in a piece of rolling stock. His layout is DC only, and I want to use power from the rails, to power the hardware. Does anyone have a good means of adding wheel wipers to allow me to access the rail voltage?
and this one shows different techniques of how to install wheel wipers.. http://www.rodmiller.com/wiper_examples.html
however, I make no endorsements to their products as I have no experience with them..
Good luck with your project..have fun, and be safe!