ultraviolet LEDs ?

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Chuck Barker
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ultraviolet LEDs ?

Post by Chuck Barker » Mon Apr 26, 2004 3:00 pm

any infromation or suppliers for ultraviolet LEDs? i bought a very small black light and would like to make something simular, but with a larger battery. this one uses four hearing aid batteries. thank you for your time and effort

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jollyrgr
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Re: ultraviolet LEDs ?

Post by jollyrgr » Mon Apr 26, 2004 3:09 pm

Ultraviolet LEDs are available from numerous suppliers. Some of the best prices are on eBay. But for standard suppliers you might want to try All Electronics:<p>http://www.allelectronics.com/cgi-bin/c ... type=store
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dyarker
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Re: ultraviolet LEDs ?

Post by dyarker » Mon Apr 26, 2004 9:53 pm

Chuck,<p>Thanks for asking the question. I thought blue was the latest and greatest. At Digikey I found 410nM and 380nM LEDs.<p>Anyone,<p>Is 410nM Violet and 380nM ultraviolet?
Dale Y

cato
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Re: ultraviolet LEDs ?

Post by cato » Tue Apr 27, 2004 2:48 am

380 is on the hairy edge of visible violet. Anything shorter could be called ultra-violet:<p>http://hyperphysics.phy-astr.gsu.edu/hb ... pecol.html

Chuck Barker
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Re: ultraviolet LEDs ?

Post by Chuck Barker » Tue Apr 27, 2004 4:12 pm

thank all of you for the information. as always this is the place to come for good answers... chuck

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haklesup
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Re: ultraviolet LEDs ?

Post by haklesup » Tue Apr 27, 2004 4:28 pm

Heres a good link on the topic:<p>http://members.misty.com/don/ledbl.html<p>He hints on ways to use them to make a blacklight and has links to other informative sites.

dyarker
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Re: ultraviolet LEDs ?

Post by dyarker » Tue Apr 27, 2004 10:48 pm

cato and haklesup, thanks for the links. Looks like 410nM is better for a violet indicator.<p>(now to see if I can find my copies of N & V that had the Big Ben clock. :) 60 reds for seconds, 60 ambers for minutes, 12 greens for hours, 31 blues for days, 12 violets for months :cool: )
((just kidding))
Dale Y

Chuck Barker
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Re: ultraviolet LEDs ?

Post by Chuck Barker » Wed Apr 28, 2004 4:30 pm

seeking more information...
ultraviolet is less than 3900 A.u. to 2000 A.u.
A.u. refers to angstrom units, what does nM mean? nanometers? chuck

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haklesup
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Re: ultraviolet LEDs ?

Post by haklesup » Wed Apr 28, 2004 6:28 pm

nM are 10E-9 Meters and I believe Angstroms are 10E-10 Meters. So, just a decimal point different. 3900Au = 390nM

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Chris Smith
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Re: ultraviolet LEDs ?

Post by Chris Smith » Wed Apr 28, 2004 7:05 pm

AU vs NM is a ten to one figure.<p> NM is nano meters in size or hight of the wave length, AU is the same with a 10 times figure. <p>AU is the OLD Physics value, where as NM is the common term of today.

Chuck Barker
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Re: ultraviolet LEDs ?

Post by Chuck Barker » Thu Apr 29, 2004 7:49 pm

thank again for the good information, chuck

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