From: Phillip Murphy (pmurf@bellsouth.net)
Date: 04/19/03-03:31:13 AM Z
Hello,
For anyone interested in constructing a LED developing
box for Becquerel developed Daguerreotypes or perhaps
for other light-sensitive systems, here's a link to a schematic
that may get you started in designing one.
http://www.web-ee.com/Schematics/Brakes/brakes.htm
btw... Digikey provides LEDs at a reasonable cost.
-Phillip
Phillip Murphy wrote:
> Hello Jeff,
>
> I haven't tested the output of these LEDs for printing
> with UV sensitive materials.
>
> However, I constructed a small LED array using diodes with
> output in the red region of the spectrum for developing
> Becquerel developed Daguerreotypes.
>
> A large array is costly to construct. I would like to
> know of your success if you decide to construct one for UV.
> I considered this for Woodburytype exposures a while back
> but following through with that remains for another day.
>
> best regards,
> Phillip
>
> "Jeff Foster, CCS Open System Group" wrote:
>
> > hi all,
> > does anyone know if it would be practical to build a
> > uv lightbox using the newer UV LED as a light source?
> >
> > The UV LED I saw had a an output expressed in "mcd" that was
> > 2000 mcd.
> > http://www.superbrightleds.com/leds/uv_specs.htm
> >
> > What is the output of a blb uv tube expressed in mcd???
> >
> > any EE out there who might know the math ?
> >
> > just s thought ....
> >
> > thanks for the time,
> > Jeff
> >
> > ----
> > Jeff Foster
> > 642-8552
> > CCS - Open Systems Group
> > UC Berkeley
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