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12v Step-down?

Discussion in 'General Electronics Discussion' started by CCinPA, Dec 18, 2017.

  1. CCinPA

    CCinPA

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    Dec 18, 2017
    In looking around a bit... I believe "step-down" is the correct term.

    12v automotive application. I need an adjustable "???" to step-down between 12v and 9(ish)v. Help?
     
  2. Tha fios agaibh

    Tha fios agaibh

    1,920
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    Aug 11, 2014
    You didn't spicify amperage but;
    Look at a lm7809 for 9v, or a lm317 for variable.
     
    Ian and Cannonball like this.
  3. duke37

    duke37

    5,253
    726
    Jan 9, 2011
    The 7809 or LM317 wil do about an amp and may need a heat sink.

    You can get switch mode buck convertors which are more efficient (less heat) and can provide higher currents. They may be a bit dirty and produce noise on radios.
     
    Last edited: Dec 18, 2017
  4. CCinPA

    CCinPA

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    Dec 18, 2017
    Update: Need a solution with lead-wires. Heat-sink? Noise would be a problem for the automotive project.
     
  5. davenn

    davenn Moderator

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    Sep 5, 2009
    what specifically do you mean by that ?
     
  6. davenn

    davenn Moderator

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    Sep 5, 2009
    search eBay for DC-DC BUCK Converters .... there's a zillion of them for a few $$ each
     
    CCinPA likes this.
  7. CCinPA

    CCinPA

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    Dec 18, 2017
    "There's the wrong-way... And my-way" (SC) :);):)

    I checked eBay... Looks very promising... Thanks! :D
     
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