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Ok, I'll give that a try. I knew about the current thing natch, I was talking about how in the FAN's instructions they have a PWM brightness control in the chip and a voltage controlled dimmer, but I never noticed the R v I table on page 9.
I liked the explanation about pots, so thanks for that.
I'm pretty thickheaded about electrical circuits, but if I think about them long enough I can normally handle a simple one.
I used to do BEAM analog robots, but I never got those things working.
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