Under construction, my Bachmann Trade Tower has some 60 LED's controlled by two Arduino Pro Mini microprocessors. One processor controls the the 13 story floor lights in a random pattern simulating movement of people within the building.  The other processor has a customized Geoff Bunza DCC decoder to control the upper corner lights and the mezzanine lights as well as the to be added Television tower on the top which will have blinking red LEDs.  

Thanks to Geoff Bunza for his excellent how to models.

I have a 5-car K-Line set of heavyweight passenger coaches.  When I received the cars, the trucks had been replaced with 2-rail trucks (which is good, since I model in 2-rail O-Scale).  All the internal lighting is still in place (including markers on the porch car), but not connected.  I can add pickups on the trucks.  Given that I operate with DCC, what are my options for operating the lights?  Voltage regulator, always on?  DCC chip - but then controlling lights that draw a lot of current?   I prefer to maintain the original lighting of these model

I have seen people that have used a bridge rectifier and a few other electronic parts covert DCC back to DC. Now I cannot locate any articles or schematics on the web. Does anyone else have a link or links to this topic?

I'm about to advise a friend on a reversing loop.  He is still DC with no current plans to change and is building a new peninsula with a reversing loop on it.  I've talked to him about auto reversing and I fairly certain you can have an auto throw, autoreversing section using current electronics without needing DCC.  Am I correct?