I have a completely isolated section with a separate transformer from the rest of the layout. I'd like to wire a light that would show me if the two transformers are set for the right direction. I.E> when train reaches the section a light comes on indicated the direction switch on the other transformer is set in the right direction. Can someone show me how to do that?
Thanks
Click Here (https://youtu.be/EoK2TrKmMeg) to view video
Adopt this simple DC polarity detector to meet your need.
That's cool and it looks simple enough. The next question would be: how and which rails on each section do I connect the red/black wires to?
I.E: both outside rails from each power pack,or outside rail from one pack to inside rail of other pack?
thanks
Use a detector for each power pack.