12 v dc dynamo

[LiveSteam]

Originally Posted by Tufty

So are you saying if you 'clamp' the field windings at 12v you will never get more that 12v output no matter what speed you run at?

No, while Steamy1 is kind of correct with their comment connecting the electronic voltage reg to the field, this wont regulate the output, my assumption was for not using a battery, and thus connecting everything up in series and hoping for enough residual magnetisium to start the generation process.
If you are adding a battery then stick with the standard mechanical regulator.

[Gaudin98]

You wont find automatic voltage control on a full size engine, just a variable field resistance and a attentive engine driver.