ogaugeguy: you might be interested in what I'm posting here:
Thanks Al for the details: it's actually what I was already thinking as the only fairly easy solution. But I was thinking that maybe you found a way to get around issues. The ONLY big issue to me is how to have the swipe piece on the button that contacts the copper shaft (for the lights) replaced with "wires" somehow. If that copper piece didn't spin with the shaft it would be easy, but since it does.....
Yesterday, since I had 2 of the toys, I tried to do exactly what your solution was. I landed up burning out the lites but don't really know why that happened. A used small 'N' scale trannie, the DC side. I BARELY turned on the power it started spinning and almost right away the lights quit coming on.
I tried reversing the wires knowing that DC operated things are often polarity sensitive, but no matter what I did I could not get the lites to come on.
I re-inserted the batteries and it did spin, but again, no lights. So I think somehow I damaged it.
I can't believe that I applied too much voltage. 3 of those button batteries amounts to 4.5V and I don't think I applied that much. I have 3 Miller power supplies that each puts out 4.5V for his signs, so one of those SHOULD work I would think. I also have a 3v supply (for the window signs) so maybe I'll try that one first.
- walt