Recent content by R33E8

fenix-store
  1. R

    I just had to LOL

    lol yeah.. I love the people who think those style smd leds are top of the line and the brightest...
  2. R

    Coolest running SMD LED?

    You can try using Cree, Lumileds, or Nichia 4-pin style LEDs.. They will probably be much brighter than the SMD LED and easier to assembly by hand... They also don't need any heat sinking..
  3. R

    Cree does it again-160 lumens per watt @350 mA

    That's cool, I wonder if they will make a MC-XM :) I'm happy I have stock in Cree :D
  4. R

    High CRI P7s!

    If anyone is still interested, I was told they should be available by May I think. They are also going to change the die wiring setup from fully parallel to 2S2P..
  5. R

    Heat vs Current on XP-G's

    As far as I know the amount of heat produce is related to how much energy is being given.. So If 12 watts of energy is being pushed in and the LED is 20% efficient, you will get 9.6 watts of heat.. But of course, as the current rises the LED becomes less efficient and outputs more heat per unit...
  6. R

    ordered - will these work together?

    yup, they will work together..
  7. R

    The first LEDs to utilize quantum dots

    No, they do have conversion losses.. And the wavelength needed is usually closer to 400nm.. When I was making quantum dots I managed to get the excitation peak up to around 420nm or so.. I didn't have enough time and ended up switching schools so I could not continue working on it..
  8. R

    12000 lump lamp???

    Heh.. 1100 or 11000?? if it's 11000 you might want to keep it because it would be hard to find an LED that efficient (147lm/w) to be that bright.. For 1100 lm you could probably used 2 or 3 Cree MC-E's or P7's.. I have no idea what to do about the reflector part...
  9. R

    Source for violet LEDs

    http://www.roithner-laser.com/index.htm They have a large variety amount of LEDs at different wavelength.. I bought a some 1 watt 420nm, 410nm, and 405nm LEDs from them.. Kinda expensive but it's the only place that I know which sells them...
  10. R

    QD-LEDs emit over whole visible spectrum

    Yeah, the excitation is probably well under 400nm for those pictures.. I remember the first quantum dots I made had a peak excitation at around 320nm... I have my QD's excitation at 420nm now with a nice smooth emission :D.. It's getting harder the closer I get to 450nm.. :(
  11. R

    Dissecting an MC-E

    :whistle: If you are waiting on mine, I'm just trying to figure out a simple way to measure CRI from spectrometer readings before I continue fine tuning them.. Hopefully I should have a lot more time to do so over the summer ..
  12. R

    Custom Chopper needs custom lights - HELP NEEDED!!!

    :( I had a nice long post and hit the back button by accident.. I wouldn't recommend using those LEDs for headlights... Check out the bicycle section for some idea on MUCH brighter solutions.. 5mm 20mA LEDs will not be enough.. http://www.candlepowerforums.com/vb/forumdisplay.php?f=86 For the...
  13. R

    I really think I should know this..

    Yeah I've mounted a few P7's on boards before using a hot plate and some solder paste for dealsextreme.. It worked well but had a lot of extra flux(probably my fault).. I think I'm just going to design one for the xp and mill it out of solid copper for a direct thermal path.. Then I create a...
  14. R

    cree solder points / ceramic base temp

    Nobody probably knows because nobody knows what the thermal resistance from that part to the die is.. A heatsink temperature next to the emitter would be give approximate results (Cree has thermal specs on their datasheet) but is still slightly dependent on how you applied thermal compound(and...
  15. R

    I really think I should know this..

    Hmm thanks for the link.. Still a bit too expensive at ~$6 for a single board.. I think I'll just come up with my own solution.. Lucky you! I got S1SSOH from a guy I know personally.. I got them at a great price though..
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