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ardenterSILVER Member newbie 37 posts Location: Denver, CO, USA
Posted: Has anyone experimented with these? Turned them into poi? Ever seen one in person? These are super ultra bright LED's. https://www.bit-tech.net/review/82/ 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?
Paddyback from the dead...sort of 884 posts Location: 43°41'N 79°38'W
Posted: Jebus, that's bright. I want a set of those.
Bender_the_OffenderGOLD Member still can't believe it's not butter 6,978 posts Location: Melbourne, Australia
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?
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
Bender_the_OffenderGOLD Member still can't believe it's not butter 6,978 posts Location: Melbourne, Australia
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!