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Thread: I need a current regulator capable of 5+ amps at 12V!

  1. #1

    Default I need a current regulator capable of 5+ amps at 12V!

    This isn't technically for a flashlight, but the application is pretty similar: A constant-current power supply for electroplating. I need to build a (preferably simple) variable current regulator capable of five or more amps at twelve volts, preferably cheaply. Efficiency and noise aren't really major requirements, as this will be plugged into a wall outlet and small variations in output power aren't a big deal. If someone could suggest a simple linear or switching regulator to do the job, I'd appreciate it.
    Last edited by spasticteapot; 11-15-2009 at 08:44 AM.

  2. #2
    Flashaholic* TorchBoy's Avatar
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    Default Re: I need a current regulator capable of 5+ amps at 12V!

    How about a car battery charger?
    No, a torch does not always mean flames.
    Ian.
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  3. #3
    Flashaholic*
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    Default Re: I need a current regulator capable of 5+ amps at 12V!

    Does it really need to be regulated? If not, a transformer and a rectifier should be all you really need.

    Here is the only switching chip I saw that meets your needs:

    http://www.mouser.com/ProductDetail/...8oOdBDSg%3d%3d

    If you want a linear regulator, here is the only one I found:

    http://www.mouser.com/ProductDetail/...5ISeRNlIE8Q%3d

  4. #4

    Default Re: I need a current regulator capable of 5+ amps at 12V!


  5. #5

    Default Re: I need a current regulator capable of 5+ amps at 12V!

    Quote Originally Posted by Minjin View Post
    Does it really need to be regulated? If not, a transformer and a rectifier should be all you really need.

    It does - in fact, a variable regulator is required (Which I probably should have mentioned in the first place.)

  6. #6
    Flashaholic* VegasF6's Avatar
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    Default Re: I need a current regulator capable of 5+ amps at 12V!

    LM338, LM138? Nothing new there.
    http://cache.national.com/ds/LM/LM138.pdf

    Current control calculator:
    http://diyaudioprojects.com/Technica...age-Regulator/

    Need a nice large transformer, or better still as suggested above a converted PC power supply.

    Interesting reading here as well.
    http://www.diyaudio.com/forums/power...regulator.html

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