Forums > Technical Discussion > Luxeon Star LED, 660,000 mcd

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ardenter
newbie
Location: Denver, CO
Member Since: 11th Jun 2002
Total posts: 37
Posted:Has anyone experimented with these? Turned them into poi? Ever seen one in person? These are super ultra bright LED's.
http://www.bit-tech.net/review/82/
br>Here's a review with pictures of a red one.
These produce 660,000 mcd, where as a regular high intensity LED may produce 12,000 (such as is near the range of beaming poi I believe). The price seems to be about $15 each, but I can't find a place to purchase them at. Anyone?

-Elfire


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frodus
member
Location: roanoke, VA
Member Since: 30th Apr 2001
Total posts: 92
Posted:the article had a link for a supplier!
read it again

here it is:
http://www.markhannahsurplus.com/
br>
also:

http://shop.store.yahoo.com/flashlight/barluxstarle.html


Peace,Travis IM: frodus17

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Paddy
back from the dead...sort of
Location: 4341'N 7938'W
Member Since: 23rd Feb 2002
Total posts: 884
Posted:Jebus, that's bright. I want a set of those.

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bender
still can't believe it's not butter
Location: Melbourne, Australia
Member Since: 14th Nov 2001
Total posts: 6979
Posted:quote:Color available is white. All LED's include optics and stock heatsink. Note: since these are intended for experimenter use and are easy to blow up, they are sold AS IS and will not be replaced if you push too much current through them, drop them, etc.heatsink?(!)
would any boffin-types know what kind of circuit this kinda led would need? what battery choices are avaiable? What's the capital of Victoria?


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frodus
member
Location: roanoke, VA
Member Since: 30th Apr 2001
Total posts: 92
Posted:If you went to the site you'd know

Typical Candela on axis 660 Cd
Dominant wavelength 627 nm
Typical luminous flux 44 lumens
Junction material Aluminum Indium Gallium Phosphide
Typical forward voltage (Vf) 2.95 V
Forward test current (If) 350 mA
Max. forward current 385 mA
Cost US $15

and in towards the end of it, the review said:

"I used 5V from an AT power supply, and five 33 Ohm, 1/4 Watt resistors in parallel. (Vs - Vf) / Id gives 5.85 ohms, and (Vs - Vf) * Id gives 718 mW, so I chose that parallel combination to make a 6.6 ohm resistor rated 1.25W to be conservative. My trusty meter showed a current of 275 mA, which is more than 20% below the rated drive current. "

go back and look. The heat sink is because this fucker gets HOT. it needs to stay cool. The normal LED's are like 10ma or so. this is 38 times that, and a LOT brighter.

all you need is a voltage source, some resistors and that LED, and some soldering skill and some electronic knowledge.


Peace,Travis IM: frodus17

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bender
still can't believe it's not butter
Location: Melbourne, Australia
Member Since: 14th Nov 2001
Total posts: 6979
Posted:so.... what battery selection and circuit design would best power it for a portable appilcation (say, in something twirlable™) thank you though
I'm forever in debt to your priceless advice!


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frodus
member
Location: roanoke, VA
Member Since: 30th Apr 2001
Total posts: 92
Posted:i wouldn't know if it would be ok to twirl
i don't know if it would damage the LED if it had sudden impact, even if it was padded.

you could use a 9v battery and some resistors and run it 1/2 power


Peace,Travis IM: frodus17

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Paddy
back from the dead...sort of
Location: 4341'N 7938'W
Member Since: 23rd Feb 2002
Total posts: 884
Posted:must...find...way...to...make...twirlable....

Think I'll grab some anyways and deck out my room with some chilled lighting. Boo yeah grandma.


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