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Converting ATX Power Supply: Adjusting +12V to 6-10V Range with Simple Schemes

Liquidator88 6082 15
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  • #1 6633506
    Liquidator88
    Level 14  
    Posts: 144
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    Board Language: polish
    How do you convert an ATX power supply so that + 12V can be adjusted from 6 to 10 volts from it? Any simple schemes?
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  • #2 6633742
    Czesiek
    Level 28  
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    You do not need to rework the adapter. It is enough to add an external voltage tegulator.
  • #3 6633890
    Liquidator88
    Level 14  
    Posts: 144
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    Board Language: polish
    Czesiek wrote:
    You do not need to modify the power supply. It is enough to add an external voltage tegulator.


    That just knew ;) Just how to make / make such a regulation?
  • #4 6776433
    Liquidator88
    Level 14  
    Posts: 144
    Rate: 4
    Board Language: polish
    Do not smoke like that, hehe :P Is there anyone who can help me in this matter? I need to make some adjustments to the ATX power supply taqk to regulate the voltage from 0-12V ... I am asking for help
  • #5 6790121
    pawel13t
    Level 17  
    Posts: 384
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    Board Language: polish
    LM317
    Pozdr.
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  • #6 6790206
    gilus1
    Level 29  
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    What intensity should this regulator be?
  • #7 6790211
    Liquidator88
    Level 14  
    Posts: 144
    Rate: 4
    Board Language: polish
    pawel13t wrote:
    LM317
    Pozdr.


    Can you be more specific? some simple scheme;>

    gilus1 wrote:
    What intensity should this regulator be?


    Such as is in the standard ATX power supply on the 12V output (those that power the HDD), i.e. from 7 to 10A max.
  • #8 6790224
    Darrieus
    Level 38  
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    Give this intensity because the LM317 may turn out to be too weak.
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  • #9 6790244
    Liquidator88
    Level 14  
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    lubamet wrote:
    Give this intensity because the LM317 may turn out to be too weak.

    7-10A max :)
  • #10 6790275
    gilus1
    Level 29  
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    If you do not need voltage below 1.2V, then you can use the LM 338 regulator (max 5A). Tell me what you need this regulation for.
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  • #11 6790314
    Darrieus
    Level 38  
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    Liquidator88 wrote:
    lubamet wrote:
    Give this intensity because the LM317 may be too weak.

    7-10A max :)


    It can instead of dorabiać the external regulator convert the ATX power supply to regulated, because with 10A it will be a slight problem.
  • #12 6790324
    Liquidator88
    Level 14  
    Posts: 144
    Rate: 4
    Board Language: polish
    This regulation is needed to power the RTG lamp incandescence, according to the lamp manufacturer max. glow current is 6A. I thought that it will use a 12V line from the ATX power supply. It only needs voltage regulation between 2 and 10V
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    #13 6790343
    Darrieus
    Level 38  
    Posts: 3684
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    LM317 + 2N3771 can be otherwise

    Converting ATX Power Supply: Adjusting +12V to 6-10V Range with Simple Schemes
  • #14 6800285
    transistor
    Level 13  
    Posts: 89
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    I'll hook up to the topic.

    I have a question: how to choose the resistor and potentiometer values depending on the voltage range we want to achieve?
  • #16 6838409
    Liquidator88
    Level 14  
    Posts: 144
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    Thank you very much for such a thing. :) Regards :) I would click "help" but unfortunately I do not have something like that on the screen ...
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Topic summary

✨ The discussion centers on converting an ATX power supply to adjust the +12V output to a range of 6 to 10 volts. Participants suggest using external voltage regulators, specifically the LM317 and LM338, to achieve this regulation. The LM317 is noted for its simplicity, while the LM338 is recommended for higher current applications, with a maximum output of 5A. The need for a regulator capable of handling 7-10A is emphasized, particularly for powering an RTG lamp with a maximum glow current of 6A. Additional inquiries about resistor and potentiometer values for voltage adjustment are also raised, with references to datasheets for further guidance.
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