Mark Rages wrote:
> Why not run the whole thing from 3V? Most microcontrollers are happy 
> at 3V.
> Have you done as Olin suggested and traced the current v. voltage
> curve for your LEDs?  I recommend you do this before deciding on a
> power source.
>   

I haven't picked my LED's yet, but I know their Vf will be less than 3 V.

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