rewinding alternators

[starfire]

Here is a somewhat lengthy but interesting series on rewinding a common alternator unit, these are pretty all much all the same in that they use counteracting  windings and resistance to give some automated voltage regulation in a passive sense. For those intrepid souls that are willing to try this, its interesting to note the minimal need of anything other than the ability to count and a large amount of patience.

https://www.youtube.com/watch?v=NwRdRpk8z-M

Alternatively, only the main windings need be wound, and any voltage regulation can be achieved via an electronic AVR acting directly on the rotor windings.  This one above is a 4 pole, but identical methods are used for 2 pole designs.
Seems to me its a very productive way to spend an evening or two in front of the fire.