My conversion is almost finished. All the lights are LED's and the smoke heater works great with a single 20Ω resistor wired through the feature channel.
What I am left with is how to power the 5vdc smoke fan motor using the Cruise Commander and Sound Commander boards. I do not see a 5vdc connection anywhere. Is there anyway to connect it that can be controlled via TMCC? It would be great if the fan ran slowly at idle then sped up when the locomotive started to move, like GRJ's Super Chuffer without the chuff (it's a turbine). I could use an AC/DC buck converter and a latching relay to turn it off and on, but that seems like an awful lot of hardware for one dinky little motor.
Any ideas?
