An eight-pin NMRA connector can be wired to the power harness to essentially make it a 'plug and play' decoder

You can have a regular flashing sign

This is a Kadee 5310 HO Scale Pullman-Standard PS-1 40' Boxcar with 8' Door - Ready to Run Union Pacific #126033 (1957 Scheme

This is an American Z-Line 9012-1 Z Scale CSX BethGon Coal Porter Freight Car Set

BTS 28235 HO Scale McCabe Lumber Co. Log Dump Laser-Cut Model Building Kit ProductID_11561947 An eight-pin NMRA connector canHere is a BTS 28235 HO Scale McCabe Lumber Co Log Dump. This kit consists of laser cut basswood, plywood, and cardstock, corrugated roofing, and detail castings. The tabbed, well engineered construction provides fast and easy assembly. The kit includes all the ties needed, but does not include the rail. It can be built as standard gauge, dual gauge, or narrow gauge. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9)