Has anybody used Neopixels to light their structures? Looks like you can use an Arduino Nano to both power and control them individually including light intensity and color. I ordered some to mess with, but was wondering what if any experience anyone on here had with them.

I ran across this video that made me aware of the technology: >

For a DCC layout of size 11' x 8' which is essentially an oval, would you run a power bus around it or just put the power supply in the middle and run feeders radially outwards to, say, four sections of soldered track, each representing a quarter of the layout? 

Does anyone know what CV turns the brake squeal on? I bought a Walthers SD60M and it squeals when it stops, it's very cool!

Any ideas for an occupancy detector for an outdoor ride-on railroad?

We would like a trigger for the grade crossing of the club's 7 1/4 gauge RR

I don't know if an infrared motion detector would detect a train car backing up - that would be at ambient temperature.