duane@cg-atla.UUCP (Andrew Duane) (09/26/88)
I think this discussion has gone much too far in rec.audio. Please take it to sci.electronics. Andrew L. Duane (JOT-7) w:(508)-658-5600 X5993 h:(603)-434-7934 Compugraphic Corp. decvax!cg-atla!duane 200 Ballardvale St. ulowell/ \laidback Wilmington, Mass. 01887 cbosgd!ima/ \cgeuro Mail Stop 200II-3-5S ism780c/ \wizvax
rp@XN.LL.MIT.EDU (Richard Pavelle) (02/12/90)
I heard that Blue LEDs are now available. Can someone tell me who
manufactures them and how they compare in cost to the standard
colors? Thanks.
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Richard Pavelle UUCP: ...ll-xn!rp
ARPANET: rp@XN.LL.MIT.EDUdu4@mace.cc.purdue.edu (Ted Goldstein) (02/13/90)
In article <1692@xn.LL.MIT.EDU> rp@XN.LL.MIT.EDU (Richard Pavelle) writes: > >I heard that Blue LEDs are now available. Can someone tell me who >manufactures them and how they compare in cost to the standard >colors? Thanks. > >-- >Richard Pavelle UUCP: ...ll-xn!rp > ARPANET: rp@XN.LL.MIT.EDU I just saw an announcement about these in the January issue of EE Product News. Reproduced without permission: "For years, the industry has awaited the advent of a blue LED. These unique silicon emitters are now available at prices between $12 and $15 each. Operating at 470 nanometer wavelengths, 100,000-hour LEDs come in both single- and multi-chip configurations. LEDTRONICS, 4009 Pacific Coast Highway, Torrance, CA 90505. (213) 549-9995" Hope this helps. Ted Goldstein du4@mace.cc.purdue.edu
berryh@udel.edu (John Berryhill) (02/13/90)
In article <1692@xn.LL.MIT.EDU> rp@XN.LL.MIT.EDU (Richard Pavelle) writes: > >I heard that Blue LEDs are now available. Can someone tell me who >manufactures them and how they compare in cost to the standard >colors? Thanks. Siemens. Not only are they expensive, but their sensitivity to bias conditions is such that it is very easy to ruin them. I believe I heard a price of around $15 in the past (compared to $0.15 for standard red leds). -- John Berryhill 143 King William, Newark DE 19711
henkp@nikhefk.UUCP (Henk Peek) (02/13/90)
In article <1692@xn.LL.MIT.EDU> rp@XN.LL.MIT.EDU (Richard Pavelle) writes: >I heard that Blue LEDs are now available. Can someone tell me who >manufactures them and how they compare in cost to the standard >colors? Thanks. Yes you can buy blue LEDs. They are expansieve ~ $25 ! and don't generate much light. From preferred Siemens component cataloge: type LB 5410-HO (old type SFH710) light output If=20 mA >=2,5mcd Henk Henkp@nikhef.nl
atn@cory.Berkeley.EDU (Alan Nishioka) (05/29/90)
I just got a flyer for Blue LEDs with my Jameco order. Some highlights: CREE Reasearch Inc. Silicon Carbide Blue LEDs -------------------------------------------------------------------------- 5C14 Standard Power Silicon Carbide Blue LED Forward Voltage (If = 20mA) 3.0 typical Radiant Flux 3.0uW typical Peak Emisssion wavelength 470nm Sprectral Halfwidth 70nm Absolute Maximum If 25mA Absolute Maximum Vr 5V 1-9 $17.95 10-99 $14.95 100+ $12.95 -------------------------------------------------------------------------- 7D16 High Power Silicon Carbide Blue LED Forward Voltage (If = 50mA) 3.0 typical Radiant Flux 11.0uW typical Peak Emisssion wavelength 470nm Sprectral Halfwidth 70nm Absolute Maximum If 60mA Absolute Maximum Vr 5V 1-9 $14.95 10-99 $12.95 100+ $11.95 (hmmm. Why cheaper?) -------------------------------------------------------------------------- Jameco, 1355 Shoreway Road, Belmont, CA 94002. (415) 592-8097 PS. Says $50.00 minimun order. Did they recently change this? ----------------------------------------------------------------------------- Alan Nishioka KC6KHV atn@cory.berkeley.edu ...!ucbvax!cory!atn
dmt@PacBell.COM (Dave Turner) (10/02/90)
Several months ago someone was looking for blue LEDs.
I just got the 1991 Jameco catalog and they have them for $9.95 each.
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Dave Turner 415/823-2001 {att,bellcore,sun,ames,decwrl}!pacbell!dmtRichard.Milward@samba.acs.unc.edu (Richard Milward) (01/02/91)
Blue LEDs are now available from DigiKey Corp. (701 Brooks Ave. South, P.O. Box 677, Thief River Falls, MN 56701-0677, 1-800-DIGI-KEY) They're made by Cree Research in Durham, N.C. T-1 and T-1-3/4 sizes, $9.75 each ($7.80 each in 100s). 470nm peak wavelength, 8 uwatts at 20 ma. BTW, they're made from silicon carbide. --Richard Milward / network tech and collector of weird information / UNC-CH Office of Data & Video COmmunications "where all old data goes to die"