I finally had to get around to making some resistor wheels for my cabooses, since I added more trains to the layout. I had ordered the stuff months ago because I knew I would have to make about 600 before it was all over.
I opened up the resistor wheel and I couldn't believe how small the resistors were. All of the pictures I had seen made them look bigger than these. Look at the top picture on the left. See the small square dot in the middle of the upper axle, that is the resistor glued to the axle.
The lower axle is where I smeared on some conductive paint (and I mean smeared).
Here you can see two with paint and two more waiting. The paint becomes conductive in about 5 minutes.
It is a little difficult to use a paint pen on a small round object and keep the lines straight. Most of these didn't work right away, but it was usually just one leg from the resistor to the wheel needed a little more paint. It is easy to check which side needs more paint by measuring through the far side of the resistor to the opposite wheel. Then put more paint where it is needed.
I put them in the cabooses and then on the track to test and everything worked good. They ain't pretty, but they work. Hopefully I'll get better as I make 600 more.
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