Oh that would be more than enough. But I was just planning on using it for the AC controller. They aren't that cheap, and you wouldn't need the 512 ticks per revolution. I think even 1 pulse per revolution would be fine for all the benefits in the DC case. I wonder if the tachometer info could somehow just be tapped into by the controller. I have never taken a tach apart, and don't really know how they work.
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