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train set power supply
We use to use a 12 volt car battery and find the tabs that connect the cells, the center tab we would use a wood screw and turn it in that will give you a nice smooth 6 volts. The older car batteries, had pitch tar like cover, and you can easily see were the tabs are. The new plastic car batteries there is no way to see that, but if you have a old car battery or lawn mower tractor type battery that you have no use for, you can still find the tabs, buried in there. The tabs stagger, and you can follow it by the battery post first.
Train set power supplies would work great, they can deliver a lot of current, at least more then what you will need and it is variable. Some of the good model railroad power supplies are very smooth in DC output.
Maybe something to keep in mind for the future, if you don't have one , you can find them at garage sales or Ebay for sure.
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