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Thread: help me do my shopping please, Romisen RC-G2 mod

  1. #1
    Enlightened
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    Thumbs up help me do my shopping please, Romisen RC-G2 mod

    hello,

    i would like to mod my faulty RC-G2 from DX.

    i have never used a solder before and never modded a flashlight aswell so this will be my first.

    can you please list everything i need to buy and use in order to mod this light into a Q5.

    so far i have these in mind, please give me advice

    driver
    emitter or emitter
    thermal or thermal

    which is the better emitter and thermal?

    i also need a soldering iron and some solder wire from DX or DSE(electronics shop in AUS) and anything else i have forgetten.

    thanks for your help
    Last edited by warriorz; 05-13-2008 at 11:20 AM.

  2. #2
    *Flashaholic* Gunner12's Avatar
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    Default Re: help me do my shopping please, Romisen RC-G2 mod

    If you are buying from DX, the driver is right, the second LED works better(no trimming needed) and the second thermal glue would be better.

    As for the soldering stuff, I'm not sure.

  3. #3
    Enlightened
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    Default Re: help me do my shopping please, Romisen RC-G2 mod

    Do you want multi-mode? That driver has a ridiculously complex UI (or maybe I'm just too simple to figure it out). But remove the negative wire and connect it to the outside ring and it makes a great single-mode driver.

    I've got the same items - RC-G2, 7880 and 16mm Q5 star - on order at the moment, I'm going to mod one and give it to my dad for his birthday. I'll try to post pictures here if that would help.
    Last edited by Dodge; 05-13-2008 at 02:59 PM.

  4. #4
    Flashaholic Brownstone's Avatar
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    Default Re: help me do my shopping please, Romisen RC-G2 mod

    driver

    In theory
    the 7880 driver will work. Solder the negative wire to the grounding ring to disable the UI. In practice, the 7880 is 17mm across, not 16mm as shown on that website. The G2 has space for a 16mm driver. Many people have reported they just use a Dremel tool to grind the driver down. But (there just had to be a catch), I just received a new 7880 from DX and the components are so near the edge I'm not sure if I could grind it down or not. I'm not saying it can't be done, but I'm saying I glanced at it and decided it needed closer attention later.

    emitter or emitter

    Those are very close to being the same emitter. The primary difference is the board they are mounted on. Get the 16mm round board, it will fit exactly in the G2.

    thermal or thermal

    The one in the small container is a grease, the one in the tube is a cement. The grease is used to make a thermal connection when something else will make your mechanical connection - for example a heatsink that is held on with screws. You want a cement (in the tube) because it makes both a thermal and a mechanical connection.

    P.S. - There USED to be a long thread about modding the G2. It appears to be lost, and nobody is able to restore it.

  5. #5
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    Default Re: help me do my shopping please, Romisen RC-G2 mod

    thanks for the replies.

    i allready had the intention of soldering the negative wire on the driver to the outside rim to make it 1 mode

    looks like l'll buy the thermal glue tube and the round Q5 emitter. as for the 7880 driver, i am a little worried now that it might not fit, but plenty of people have done it, so i might take the risk.

    will anyone be able to guide me in the soldering direction? if not, l'll just go to the shop and ask them but l'll like to have different peoples opinion.

    @ Brownstone
    will you be able to take a picture of the driver please? there seems to be a larger/different driver than the one in the DX picture.

    yeah i remember that massive RC-G2 mod thread a while back and have tried searching for it, then i realised it was missing.

    thanks

  6. #6
    Flashaholic Brownstone's Avatar
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    Default Re: help me do my shopping please, Romisen RC-G2 mod

    Quote Originally Posted by warriorz View Post
    will you be able to take a picture of the driver please?
    This is from the latest batch of 7880 drivers. Note the proximity of components to the ground ring at approximately 12:00 and 8:00 in the second photo.




    Last edited by Brownstone; 05-13-2008 at 09:23 PM.

  7. #7
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    Default Re: help me do my shopping please, Romisen RC-G2 mod

    your right, l'm not sure what to do now aswell, it's pretty risky to sand down 1-2mm off that driver, ahhh man

    is there another driver from DX that will work with a Q5?

  8. #8
    Flashaholic taschenlampe's Avatar
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    Default Re: help me do my shopping please, Romisen RC-G2 mod

    Member "gOhAsE" pointed out a simple way to mount a 17mm board
    into an RC-G2:



    left: gOhAsE’s method, right: standard method




    tl

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