Post by thread:High-Brightness LEDs

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_OUTczgurisTakeThisOuTinterport.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 ======================================================================

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 (.....tpetersonKILLspam@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

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. optoengKILLspamwhidbey.com non-contact sensing and optoelectronics specialists

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 -