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PICList Thread
'High-Brightness LEDs'
1996\08\14@143407 by Christopher Zguris

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As part of a PIC-based flasher project, I'm looking for high-brightness LEDs
in the 5000-7000 mcd range. Digi-Key and Mouser have 1640-2000 mcd, and
Jameco has a 7000 mcd, but I'm looking for sources in addition to Jameco
(cheaper, better, etc.). Quantities of around 100, at the moment. Any thoughts?

Chris

   ======================================================================
         Christopher Zguris  -  spam_OUTczgurisTakeThisOuTspaminterport.net  -  Uhhh, Ear?
                 1991 Honda VFR (Red, with red accessories)
            AMA, HSTA, CRV, HRCA, IVFROC, ex-Big Apple Vegetarian

                       BEAR RESISTANT FOOD CONTAINERS
      Made of high impact ABS plastic with stainless steel latches. The
       container is entirely flush and cannot be opened unless the bear
                         has a coin or screwdriver.
                              - CAMPMOR catalog
   ======================================================================

1996\08\14@160818 by Todd Peterson

picon face
At 02:33 PM 8/14/96 -0400, you wrote:
>As part of a PIC-based flasher project, I'm looking for high-brightness LEDs
>in the 5000-7000 mcd range. Digi-Key and Mouser have 1640-2000 mcd, and
>Jameco has a 7000 mcd, but I'm looking for sources in addition to Jameco
>(cheaper, better, etc.). Quantities of around 100, at the moment. Any thoughts?

Check out Marktech International Corp., (518)786-6591
Sorry, I don't know if they have a web site yet.

Todd Peterson, Computer Engineer   (.....tpetersonKILLspamspam@spam@netins.net)
E-LAB Digital Engineering, Inc.

1932 Hwy. 20
P.O. Box 246
Lawton, IA 51030-0246
(712) 944-5344

Visit us at: http://www.netins.net/showcase/elab

1996\08\14@160943 by Paul Mathews

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face
Christopher Zguris wrote:
>
> As part of a PIC-based flasher project, I'm looking for high-brightness LEDs
> in the 5000-7000 mcd range. Digi-Key and Mouser have 1640-2000 mcd, and
> Jameco has a 7000 mcd, but I'm looking for sources in addition to Jameco
> (cheaper, better, etc.). Quantities of around 100, at the moment. Any
thoughts?
>
....


Currently, the very highest brightness red LEDs are made by Mitsubishi
Cable (800 262 6200), however, very good ones are offered by Marktech
(Toshiba, 518 786 6591), Sharp (800 642 0261), Siemens Opto (408 777
4968), Stanley (, and others.  Note that the brightness spec depends
strongly on coverage angle.  The easiest way to achieve a very high
brightness spec is to narrow the angle by means of a longer focal
length: brightness varies with the inverse square of coverage angle.
That's one reason why the jumbo packages achieve higher brightness: they
maintain low f# even with a longer FL.

Since you mention Digikey, I assume you're in USA, and the above are the
USA phone #s:


--

Paul Mathews, consulting engineer
AEngineering Co.
optoengspamKILLspamwhidbey.com
non-contact sensing and optoelectronics specialists

1996\08\14@162225 by Mark K Sullivan

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face
Sharp and HP both have high brightness transparent substrate LEDs.  I have used
the Sharp and like them.  Warning: since the chip is "upside down" in the
package, the polarity may appear to be backwards to what you're used to.  This
is also true of the Marktech units.

- Mark Sullivan -

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