On 3/18/06, William Chops Westfield <westfw@mac.com> wrote:
>
> On Mar 17, 2006, at 11:03 PM, Vasile Surducan wrote:
>
> > So you need a binary controlled resistor for a 2^n
> > levels of brightness.
> >
> Can't you just do the brightness via PWM, even without
> any resistors?

Of course I can, but need to change the resistor controlled zenner with
a PWM controlled voltage regulator.
greetings,
Vasile

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