The parts arrived. I haven't made up a proper schematic yet, but here is a rough overview of the electronics:
It is simple enough you can probably figure it out from just that. I'll post a schematic once the resistor, capacitor, and pin details are finalized.
Also, some progress has been made on the wooden aspect. I made this piece to attach the four head segments. I also cut a rabbet in the segments so everything locks together nicely.
To attach it to the shaft I cut the end of the dowel to make a snug fitting tongue... well, that's easier to explain with a picture.