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transforming dc to dc

Discussion in 'Electronic Design' started by default, Apr 25, 2007.

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  1. default

    default Guest

    Of course there is - but it takes some knowledge in electronics . . .

    ditch the 9 volt battery if you can and use something like D batteries
    for 6 volts then build a DC/DC converter.

    By putting all the load on a single 9 V battery it will die in less
    than 1/3 the time of the original - and 9V batteries aren't the most
    cost effective source of power.
  2. Guest

    Hi y'all,
    I have a homemade electrolysis device that operates with 27volts dc
    that is, 3 x 9v batteries. Is there a way to design a simple circuit
    in order to use just one 9v battery and still get the 27v output?
    Sorry my knowledge in electronics is zero to none. Any help is

    Thank you in advance

  3. Fred Bloggs

    Fred Bloggs Guest

    Finally "Phil Allison" comes clean on his capabilities...
  4. rebel

    rebel Guest

    Nah, the headers @ -0700 don't fit his side of Asutralia (+0800) and he's not
    half clever enough to forge headers.

    To the O/P: yes, easy, but the downside is that your single 9V battery will
    last roughly 1/4 as long as the three-in-series combination.

    Search for the data sheet for the MC34063. There is a 12V_in_to_28V_out
    converter schematic in there which works straight off the plan, and will still
    deliver 28V out at 4V in so you can really wring the neck of your 9V units.
  5. Quite a lot of voltage for electrolysis,
    isn't it ? Normally the required voltages
    are around 1-2V

  6. John Larkin

    John Larkin Guest

    Not a "simple circuit."

    You can buy low-power dc/dc converter bricks, up to 3 watts maybe,
    from the Mouser or Digikey catalogs.

  7. Tam/WB2TT

    Tam/WB2TT Guest

    Any reason this has to be portable? If you have an old wall transformer with
    DC output, try it. My guess is that a 12 V unit will work. Else, you can buy
    one with higher output. I would not buy anything that runs off a 9 V
    battery, unless the use is for a few seconds a day.

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