Spehro Pefhany wrote:
>
> At 12:52 AM 7/12/01 +1000, you wrote:
> >
> >Hi Spehro, if you haven't done so yet have a
> >play with a 6000mCd white led.
>
> The best ones I see at Digikey are ~2300mcd "typical"
> at 20mA. For about $3 US each. So, if they are linear
> they'd be around 6000mcd at 50mA.

I got mine from www.jaycarelectronics.com (I think)
they are listed as 6000mCd. 2300mCd sounds like the
older weaker leds.


> I designed a white-
> LED microscope ring illuminator for a friend, but
> I'll have to wait till I get out to California again
> to actually see it in action. ;-)

Cool! Literally too. :o)


> >I can't believe Philips' claims of "not efficient yet"
> >i'm sure a hundred of these leds running from 240vac
> >would still only draw 50mA and give as much (or more)
> >light as a 60w bulb drawing 250mA.
>
> I think your order of magnitude is right. But an 11W
> flourescent is about as bright too and is very cheap.

Good point. But you have to agree that solid state
lighting has a real appeal to it...


> >And they make awesome "point lights" for looking down
> >in PCB crevices etc. Mine give more light at 2 inches
> >than a 40w 4 foot fluoro tube at 2". One of these days
> >I will take a picture of our point lights and put it
> >up on the net; 5x 110mAh NiCd, a stick, a switch,
> >a resistor and a white led.
> >One of the most useful tools I have ever built.
>
> I'd like to see that. Sounds like a good idea. Maybe I'll
> use one or two (depending if I feel like making a SMPS)
> of those NiMH battery packs I picked up in Tucson and
> make one.

Ok, i'll take a picture and put it up.
Coupl'a days... :o)
-Roman

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