Results 1 to 8 of 8
  1. #1
    mtbr member
    Reputation: TJWilly's Avatar
    Join Date
    Feb 2012
    Posts
    41

    LED and Driver question 2 for 1!

    1. Can someone quickly tell me the difference between XM-L 280lm vs XM-L U2 emitters?


    2. I have a couple 8xAMC7135 drivers and was wondering... when soldering past them, on the back plate, do I just solder (+) to center and pick any place on the edge to solder (-) to? If I need to post a pic, I can.


    Thks

  2. #2
    mtbr member
    Reputation:
    Join Date
    May 2005
    Posts
    2,167
    1. No way to compare. The 280 lm is a value for light output, the U2 is a brightness ( bin code) classification.

    2. If you are talking about battery connections, then you are right. If you mean + and - for the LED, then you are not right.

  3. #3
    mtbr member
    Reputation: TJWilly's Avatar
    Join Date
    Feb 2012
    Posts
    41
    Quote Originally Posted by Vancbiker View Post
    1. No way to compare. The 280 lm is a value for light output, the U2 is a brightness ( bin code) classification.

    2. If you are talking about battery connections, then you are right. If you mean + and - for the LED, then you are not right.
    Sorry, still trying to figure this out... Ok... then how about this:

    led 1: Cree XM-L Star LED - LED Supply.com
    vs
    led 2: Cree XM-L U2 LED Emitter with 20mm Base

    Just trying to stay away from DX for right now. I have a couple each of these by the way.

    2. Ok then I think I am right when I say past - I meant furthest solder point away from source being the LED. Also same as backplate or backside of the Driver.

    But yeah, I should have said battery side. lol.

    Thanks Vancbiker

    edit: with the LEDs - some of the terminology, I am still trying to nail down. :/

  4. #4
    mtbr member
    Reputation: yetibetty's Avatar
    Join Date
    Dec 2007
    Posts
    1,780
    The LED Supply one is a T6
    Attached Thumbnails Attached Thumbnails LED and Driver question 2 for 1!-t6.jpg  

    LED and Driver question 2 for 1!-xml.jpg  


  5. #5
    mtbr member
    Reputation: TJWilly's Avatar
    Join Date
    Feb 2012
    Posts
    41
    Understood. I see why y'all sometimes say a 'T6' or a 'T4' and now perhaps a 'U2'.



    So much to take in since I walked in here earlier this week...

    In other news, my phucked build is all but done. Waiting on 18650s to build a suitable pack. Tested with some crappy AA batts. Modified it slightly with a switch on top.

    AND it got a T6. lol....


  6. #6
    mtbr member
    Reputation:
    Join Date
    Jul 2007
    Posts
    1,119
    If you're using this 7135 board - all connections can be made on the front side if needed. EL34 has a nice writeup on ways it can be wired:

    2800ma Multi Mode Driver Board



  7. #7
    mtbr member
    Reputation: TJWilly's Avatar
    Join Date
    Feb 2012
    Posts
    41
    Thanks. Great right up. I had not seen that. The mode info was most useful. I currently have it mode 1 but may change to mode three using his trick.

    Do you guys like having the strobe option on helmet lamps?

  8. #8
    mtbr member
    Reputation:
    Join Date
    Jul 2007
    Posts
    1,119
    Strobe is useless to me on everything but a taillight. It really doesn't work well when trail riding at night.

    Sent from my DROID RAZR using Tapatalk 2

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •