Ok, the grandkids saw my latest project installing LEDs into my G scale cars and they want them! Well to be honest, I do too. I bought them too many lighted cars and they burned up some power and track components. So I'd like the cars to draw less. After kicking around several easy and cheap ways to do it, it was just as easy to do their cars the same way as mine with the buck boards and the 12v LED strips. I bought everything in quantity and no reason to stop short on these.
So I'm installing everything except the poly fuses haven't arrived yet. It occurred to me that the way some guys drew their diagram, the poly fuses would do better if put on each roller. If I just used one to split them, what if the wheels wire did the connecting? The diagram I saw showed the single fuse put in between the rollers and one was wired direct?
I guess if I overthink this, four poly fuses should be used?? (one on each wire?).
I used a smaller cap on their's, and the smaller buck board as well. Nothing is stuck down yet as I'm waiting for the fuses.