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convert 3v to 12v?

Discussion in 'General Electronics Discussion' started by nopuk, Jan 24, 2020.

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  1. nopuk

    nopuk

    19
    0
    May 11, 2015
    Hi,
    Would like to build a small LED light system powered by 2 AA's i.e 3v. But I would like 12v for what I have in mind.

    Is there anyway to go about this? What components do I look for ? What are the downsides?
     
  2. Bluejets

    Bluejets

    4,208
    893
    Oct 5, 2014
  3. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    The question is why you would want to use 12V for LEDs when the max voltage they require is about 3.5V?

    And what kind of power are we talking about?

    Bob
     
  4. bertus

    bertus Moderator

    993
    368
    Nov 8, 2019
    Hello,

    When you convert the 3 Volts to 12 Volts, the current on the 3 Volts side will be at about 4.5 to 5 times higher, due to efficiency losses.

    Bertus
     
  5. Audioguru

    Audioguru

    2,924
    654
    Sep 24, 2016
    A string of LED "fairy lights" is sold at The Dollar Store and uses one AA cell and lights about 20 LEDs.
    I have two that have 10 LEDs that can be switched on or switched to flashing and they are powered from one rechargeable AAA cell and are charged from a little solar panel.

    The LEDs are all matched so that they are connected in parallel.
     
  6. Martaine2005

    Martaine2005

    2,921
    798
    May 12, 2015
    And what would that be?
    My crystal ball is on holiday today.

    Martin
     
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