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

Posted: 3rd Jul 2002
the article had a link for a supplier!
read it again

here it is:
https://www.markhannahsurplus.com/

also:

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

Peace,Travis IM: frodus17

Posted: 3rd Jul 2002
Jebus, that's bright. I want a set of those.

Posted: 4th Jul 2002

quote:

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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.

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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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Posted: 4th Jul 2002
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

Posted: 3rd Jul 2002
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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Posted: 3rd Jul 2002
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

Posted: 10th Jul 2002
must...find...way...to...make...twirlable....

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