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Thread: Trying to build Small sbr-90 Light need help

  1. #1

    Default Trying to build Small sbr-90 Light need help

    Hey Guys I have bitton off more than I can chew and need help. I'm trying to build a small pocket flashlight out of an SBR-90 but am a little lost.

    I want the light to be all through so I know I need an aspherical lens style light which is awesome because I have tons.

    What I don't know is do I need a reflector for a dome-less LED.
    I plan to only run the led at 3 amps as I found on my bench PSU test to be plenty bright.
    Im looking at hosts like this but IDK of i can get away with.
    https://www.fasttech.com/products/1618/10002463/1277401

    this is what I'm going for but brighter.
    http://the-gadgeteer.com/2012/08/01/...hlight-review/

    Any help or advice would be greatly appreciated.

  2. #2
    Flashaholic* BLUE LED's Avatar
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    Default Re: Trying to build Small sbr-90 Light need help

    You are going to need a lot of help. I would suggest asking in the home made and modified section.

    Your set-up seems a little odd to me in terms of your choice of LED and host.

  3. #3
    *Flashaholic* Str8stroke's Avatar
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    Default Re: Trying to build Small sbr-90 Light need help

    BLUE is right.
    What is your goal? Intended use and run time?
    3 amps is pretty strong and you are gonna need a heat dissipation plan.
    That host could work, but you have to consider your goals, heat dissipation, driver, battery, then lens and reflectors. That COB led is not really optimum for a throw led.

    Welcome to CPF. Did you search BLF and see if anyone has messed with that led?
    Interested in Saltytri lights. Pm me!


  4. #4

    Default Re: Trying to build Small sbr-90 Light need help

    Thanks guys Run-time should not be an Issue as I have a nice copper puck for it. I already tested it at 3 amps for 5 minutes and it does not get too hot.
    I have a camera with an electronic viewfinder and this light is mainly so I can light up the woods across the street to focus my camera. Run time could be 8 seconds and I would not care.
    Ive searched for others with this LED but can only find Pre built reviews.

    My main issue is I just need to know the best way to drive this LED I'm not to familiar with drivers.

    Edit: been looking around but cant find any.
    Anyone have any good links that explain throw vs flood light.
    Last edited by lazerman121; 02-04-2016 at 01:48 PM.

  5. #5
    Flashaholic* BLUE LED's Avatar
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    Default Re: Trying to build Small sbr-90 Light need help

    Are you after a thrower in a small light?

    Don't forget to use thicker bond wires and a good 18650. That is if you are going for the single 18650 route. Do you know what voltage range you are after.

  6. #6

    Default Re: Trying to build Small sbr-90 Light need help

    OK sorry for the delay been busy the past few days.
    It looks like I will need a large mag-light style host.
    that being said I may do a Jayrob style build or buy a used Olight SR95S-UT

  7. #7
    Flashaholic* BLUE LED's Avatar
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    Default Re: Trying to build Small sbr-90 Light need help

    This makes much more sense now. Using a larger light with a bigger reflector will it throw I have not used the SBR-90 LED and I am not sure how easy it is to focus. Based upon that it would be better to use a Mag host, as there are different reflectors available.

    This might be a better option to buying a used Olight SR95S-UT; because this is already a thrower and the SBR-90 may or may not focus well.

    It sounds like an interesting project which ever you decide.

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