Nicolas Alvarez wrote:
> scott wrote:
>>> Well, I had a diagram for a circuit where you connect a lamp to the
>>> battery through a linear potentiometer. The brightness of the lamp
>>> varies roughly linearly. But the brightness of an LED... does not.
>> LED brightness is proportional to current not voltage!
> 
> Also, are *human eyes* linear? Would you notice when brightness is changing
> perfectly linearly? :)

Probably not. But when the light stays off, and then suddenly turns full 
on, with nothing in between, I'm fairly sure that's non-linear. ;-)

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