Re: LED's as an enlarger source

Collin Brendemuehl wrote:
> 
> "Dennis O'Connor" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> > Nuts&Volts would have published it in a heart beat... Probably still will...
> > Denny
> 
> Wouldn't be too difficult, either.
> Since the LEDs will be strobed (cutting current consumption way back,
> thus controlling heat) one could easily vary the frequency to suit
> the measured output of each colors set.   To vary each level as required
> a simple switch read could be used to allow user control.
> 
> Personally, I'd use a PIC, but there are may others that would be suitable.
> Low power consumption would be paramount.
> LED layout could be a simple matrix so that colors mix evenly.
> 
> This doesn't sound too difficult ... all I need is T - I - M - E !
> 
> Collin
Whatever you guys want is OK by me, but don't use red light for
fosusing. Human visual acuity is worst there, and chromatic aberration
of the eye complicates matters by introducing an average focus shift
even when you use a grain focuser. Green is better.