function outputs capacity

You should be able to get at least 100ma from the lighting outputs.  If you use the correct value resistors, I can't see why you can't light 8 LED's.  Size the resistors to supply 10ma, the lights will still be plenty bright.  I'd probably start with 470 ohms and see what that looks like.

Joe,  The MTH bulbs draw about 60ma.  They recommend only 2 bulbs, but they have installed up to 3 via patch panel on some models.  The FET can handle it.

On the markers circuit these are powered by the 5VDC regulator.  They have resistors in place already in the circuit.  I would be careful using this output to drive more devices or lights.  That 5VDC regulator is a 1 amp unit, but it feeds every processor but 3, the 3.3V regulator which feeds those 3 processors, the fan motor, tach reader, and speaker.  So I would hate to run that one at max output:-)

The lighting circuit is fed via the main rectifier and limited to 6V effective voltage via PWM of the FET.  

You could also install a CV board and feed the additional lighting from that.  Since this is a G engine with room, you could put a relay in and use a light output to turn the relay on an off to control the CV board.  Just don't do any of this while the engine is powered up-;  G

Now G, why would you tell me that?? Not like I do it all the time?

Thanks for the info. I will copy it so I can use it in the future. I have removed the smoke unit completely. Maybe that could supply power for the LEDs?? The interior light is where I had them hooked up.

Joe, The heater side is the PV and the fan is +5VDC.  So using the heater element certainly has the amp capacity.  Would be interested to see how it worked, since I am not sure exactly how the sound file controls the heating element FET.  PWM, always on, varies with speed etc....  G

 Well it's running G! I haven't finished but I will.

http://www.youtube.com/watch?v=jxkXHs1gHn4&feature=youtu.be

I'll be posting another video of a lashup multi-unit consist. It's running well together with my others. Takes me about an hour to load a decent size video.

 Here it is!

 Maybe Barry could work on board connections for his next book?? We can't seem to agree.