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Thread: The U2's selector ring magnet

  1. #1
    Flashaholic* grnamin's Avatar
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    Default The U2's selector ring magnet

    I'm in the process of modding my U2. I removed the selector ring and out popped the magnet. It's pretty powerful for a little dot of a thing. My U2 cycles back to the lowest level in between levels 1 thru 4. Mkes me wonder how powerful the magnet has to be so that the light level selections transition smoothly. If I stick the magnet on my fridge, I have to slide it off. I have difficulty lifting it. It's that powerful.
    -Greg

  2. #2
    Flashaholic Chucula's Avatar
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    Default Re: The U2's selector ring magnet

    its a neodymium (NdFeB).

    can buy em here

    they are very powerful, but come in different grades (highest ive seen for sale is N45). You could possibly put a higher grade magnet in there (if its not already highest grade) and have a more fluid transition between levels.

    I bought some really big ndfeb magnets--it can be scary
    Last edited by Chucula; 09-10-2006 at 07:57 AM.

  3. #3
    Flashaholic* grnamin's Avatar
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    Default Re: The U2's selector ring magnet

    Thanks, Chucula. I'll check them out.
    -Greg

  4. #4
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    Default Re: The U2's selector ring magnet

    How'd you get the selector ring off?!

  5. #5
    Flashaholic* grnamin's Avatar
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    Default Re: The U2's selector ring magnet

    Quote Originally Posted by scott.cr
    How'd you get the selector ring off?!
    I wrapped an old bicycle inner tube around the bezel, same with the selector ring for grip, then twist the selector ring past the lowest light level at the same time pulling on the ring away from the bezel. Some plastic from the inside of the ring might come off as a result, but no real damage. What really holds the ring in place is a C-shaped spring clip.
    -Greg

  6. #6

    Default Re: The U2's selector ring magnet

    Quote Originally Posted by grnamin
    I wrapped an old bicycle inner tube around the bezel, same with the selector ring for grip, then twist the selector ring past the lowest light level at the same time pulling on the ring away from the bezel. Some plastic from the inside of the ring might come off as a result, but no real damage. What really holds the ring in place is a C-shaped spring clip.
    WOW, you're brave! I don't think I could ever bring myself to try anything like that w/ my U2.
    U2 | G2L | G2Z | L4 | LX2 | A2 | E2e | Mag2C ROP-LE | ML1 | ML1-X | L1-Cree | SF-III | T1A w/ XP-G | Malkoff MD2 w/ M60L, HAIII 6P w/ M60,M61

  7. #7
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    Kiessling's Avatar
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    Default Re: The U2's selector ring magnet

    You're brave
    There is a type of perfection that transcends the quest for lumens. Buying a $250 1-cell light for "lum factor" is like buying a $250 single malt Scotch for the alcohol content.
    - paulr


    It's always darkest just before it goes pitch black.
    My shoes are too tight. But it doesn't matter, because I have forgotten how to dance.

  8. #8
    Flashaholic* grnamin's Avatar
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    Default Re: The U2's selector ring magnet

    LOL! I discovered how to remove the selector ring by accident. I was trying to loosen the bezel to expose the LED. I twisted and the ring came off.
    -Greg

  9. #9
    Flashaholic* KDOG3's Avatar
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    Default Re: The U2's selector ring magnet

    Hmmm. Interesting thread, I'm in the process of trying to get a U2. And I have a box of those little NdFeb magnets.

    What was the problem you were having with your light that made you want to take it apart? If you are modding, what are you doing to it?
    FAILURE TO PLAN ON YOUR PART DOES NOT CONSTITUTE AN EMERGENCY ON MY PART.

  10. #10
    Flashaholic* grnamin's Avatar
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    Default Re: The U2's selector ring magnet

    Quote Originally Posted by KDOG3
    What was the problem you were having with your light that made you want to take it apart? If you are modding, what are you doing to it?
    That part is under wraps for now. I might be able to post pictures by tomorrow night, if I'm able to complete the project tonight.
    -Greg

  11. #11
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    Default Re: The U2's selector ring magnet

    Neodymium magnets are fun to play around with I have a about three different sizes and they are stupidly strong for their size. I'm staying at the size where you will only get pinched and get a blood blister in a worst case scenario, the bigger ones are just too scary.

    Did anyone catch the "Mythbusters" episode where Jamie used these types of magnets to try to climb up in a ventilation shaft? Those things were hooge.

  12. #12

    Default Re: The U2's selector ring magnet

    What does the magnet look like?

  13. #13
    Flashaholic* grnamin's Avatar
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    Default Re: The U2's selector ring magnet

    Quote Originally Posted by EVAN_TAD
    What does the magnet look like?
    It's a disk, about 4mm wide x 2mm deep.

    Here's a really bad picture of it holding an envelope onto a metal door:
    -Greg

  14. #14

    Default Re: The U2's selector ring magnet

    Quote Originally Posted by grnamin
    It's a disk, about 4mm wide x 2mm deep.

    Here's a really bad picture of it holding an envelope onto a metal door:

    That is pretty close to the ones you can get at RatShack
    Last edited by Luna; 09-13-2006 at 07:44 AM. Reason: Remove img accidentally included in quote

  15. #15
    Flashaholic Chucula's Avatar
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    Default Re: The U2's selector ring magnet

    ah i have one that is a 1/2" sphere and another that is a disc that is about 2" wide and 1/2" deep. those two wreaked havoc when i was playing with ferrofluid. I was trying to do this

    But instead i got this


    Well maybe not exactly that, but it made a mess.
    Last edited by Size15's; 09-13-2006 at 06:19 AM. Reason: Hotlinking images without permission is against the rules

  16. #16
    Flashaholic* KDOG3's Avatar
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    Default Re: The U2's selector ring magnet

    HAR!
    FAILURE TO PLAN ON YOUR PART DOES NOT CONSTITUTE AN EMERGENCY ON MY PART.

  17. #17
    Flashaholic* grnamin's Avatar
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    Default Re: The U2's selector ring magnet

    LOL!
    -Greg

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