boost converter 3.7 boosted to 5v noob needs help!

Discussion in 'The Projects Forum' started by freddo, May 16, 2009.

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  1. freddo

    Thread Starter New Member

    May 16, 2009
    3
    0
    Hi guys,
    ok
    ,
    i'm
    a bit new to this so be patient :D

    well, i am going to be using this battery, an
    ultrafire
    3.7v 2200
    mah
    battery (18650) and i need to boost the voltage up to 5v

    I have been looking at boost converters, and sifting through posts to see if i could figure out how to do it through that....i couldn't!

    If a kind soul would be willing to help out a
    nooby
    that wants to learn i would be very appreciative!

    What i need is a parts list of what i would need, and how i would connect it all together, or even someone to tell me if this is even possible!

    Also, the battery is rated at 2200
    mah
    , i assume by boosting it the battery wouldn't last as long, could you tell me how much battery life i would be loosing?

    Thanks
    alot
    , any help would be great

    (please remember, i a newbie!(but a quick learner)

    Cheers

    Fred
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    What is the maximum current that you intend to provide to the load?

    hgmjr
     
  3. freddo

    Thread Starter New Member

    May 16, 2009
    3
    0
    the maximum supply the device i am powering is 7v

    Cheers (hope this is what you were asking)
     
  4. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Actually I was asking what is the current that you expect the load to require. Your battery is capable of 3.7V at 2.2 Amps. That would mean that under ideal conditions with 80% efficient boost SMPS (Switch-Mode Power Supply), you would be able to deliver about 5V at 1.3 Amps to your load. Is that enough current for your load?

    hgmjr
     
  5. freddo

    Thread Starter New Member

    May 16, 2009
    3
    0
    my device draws about 1amp so that would be perfect right?

    Thanks
     
  6. djb

    Member

    May 17, 2008
    18
    0
    If you are still here after 6 years i have a new thread of a step up and usb charger.
     
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