I have a Roco Ãƒâ€“BB 1044 dummy locomotive (Roco item 43727, special series for Austria only, delivered from the factory unpowered). I plan to use this loco in the future to simulate a pusher locomotive on heavier trains. Works much better than having a powered pusher, which on model layouts can lead to derailments. Two powered locos up front should work fine for such trains.
Anyway, I would like to light up the rear red lights on this loco.
The loco does have the "Lichtleiter" plastic light guides in body shell. It does not have pre-wired pickups from the wheels, and it looks like these would be a pain to install. Aso, since -- at least in the near future -- I will stick with analog operations, I would like the lights to stay on even if the train is stopped.
It looks like there is sufficient space in the body of the loco for a standard 9 volt battery. And, it should not be too difficult to wire in a small switch acessible through the bottom of the locomotive.
I would prefer to install an LED rather than a conventional light bulb, as these are brighter and less likely to burn out over time.
So, my question is this: Do any of you have a suggestion for a specific product that would provide just a single LED for this purpose. And, what would I need to do to be able to use this LED with a 9V battery. (Would I need to install a resistor-- if one doesn't already come with product suggested? If so, what value?)
Any suggestions welcome. This is not a particularly urgent project, so there is no hurry.
By the way, I would blank off the other Lichtleiter to the headlights at the opposite end of the loco, as in pusher service the headlights would normally not be lit.