Recent content by chris_m

fenix-store
  1. C

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

    The thing is it's not the emitted angle of light which makes it hard to make the XP-G throw, it's the size of the die. As already discussed earlier in this very thread (and why this new LED with an even larger die won't be good for throw either).
  2. C

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

    Well to be strictly accurate they say it has a larger footprint than the XP series, which means package size rather than die size, so the die could be anything - though it seems unlikely the die wouldn't be bigger, otherwise why not keep the same package? Have to admit to being slightly...
  3. C

    LiPo for Bike lights?

    Well for the sake of Lithium one-upmanship, http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=1199 is a 99g 7.4V 2400mAh pack. The only reason mine are a bit lower capacity is they're not quite state of the art (been using those cells for 4 or 5 years). Though the point wasn't...
  4. C

    LiPo for Bike lights?

    Not managed to get near the scales, but realised I had done so previously and posted the results on a different forum. My 2 cell (7.4V) 2230mAh (got my maths wrong before - they come from a 4460mAh laptop battery) pack weighs 101g including (short) power cable, balance cable and fuse. On that...
  5. C

    Taskled?

    Cheers trout, it's a maxflex I'm after - pm on it's way. Ifor can doubtless guess why I'm busy looking at sorting out my lights at this time of year :thumbsup:
  6. C

    Taskled?

    Wanted to go and order a new driver, but found the site is down. Is this just new and temporary, or has it been down for a while?
  7. C

    LiPo for Bike lights?

    Yes, about 3 times as heavy, but then the 3.7V cells I was quoting are more than 3 times lighter than the 11.1V pack! That LiPo is a tad lighter than those I'd found, but you've got to compare like with like. The LiIon pack has a built in PCB, which the LiPo doesn't. Anyway, as I mentioned...
  8. C

    Custom made SSC P7 LED Bike lights

    Actually it was a totally pointless example. Whether you get burnt by the slab of metal but not by the tin foil has absolutely nothing to do with the thickness of metal which is useful for the outer body of a lamp. Looks nice - shame you don't seem to either have a clue about thermal paths, or...
  9. C

    LiPo for Bike lights?

    Can somebody give me a link to these lightweight ones you're using? Unless I'm missing something here, they're actually heavier than LiIon - I wondered if things had changed since I last selected batteries, but I did a quick check and they haven't. A typical 2200mAh 11.1V LiPo battery I found is...
  10. C

    Cheap small soldering iron

    Currently I use an Antex XS25, but it's really a little clumsy for some of the smaller stuff I do - I do sometimes work with SOICs and 0805 (or even 0603) SM parts, along with small connectors. Whilst it works great for bigger jobs, I don't find the XS is that great with the point tip for doing...
  11. C

    headlamp for a runner

    Whilst I normally use a homemade multi-LED headlamp which pumps out ~600 lumens for night-O (as discussed extensively above), I have successfully (I won the event) used a modded Eos. I'd have no worries at all about using one for trail running. The only reason I need more lumens usually is that...
  12. C

    Lumicycle have finally jumped onto the LED scene!

    That would make sense - fairly sure I've also seen it suggested elsewhere that they use >1A. Makes for nice headline figures, but not sure I see the point given the drop off in efficiency up there, and that it's pretty hard to tell the difference between 750lm and 850lm without a back-to-back...
  13. C

    Lumicycle have finally jumped onto the LED scene!

    I'd be surprised if you could get 5degC between the back of the MCPCB and the slug with a typical MCPCB used for an XR-E - generally they seem to have a very thin layer of poor thermal material. Could of course be using plain emitters on a proper production job (one of my homebuilds has XR-Es...
  14. C

    Bike UI on *Flex drivers

    Just as a data point for you George, I should mention that my custom firmware has exactly (in software terms) doubling of current between each level - though only 4 levels. Given the fact that doubling the current only increases light output by ~60% and the logarithmic nature of vision, this...
  15. C

    Maxflex3

    But then so will my planned twin MC-E. Certainly don't plan on using full power on that all the time. Good to hear that something with worse potential thermal issues works fine.
See more

Latest posts

Top