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Thread: Powering everything from M2-ATX? (Wiring diagram included)

  1. #21
    Variable Bitrate afterdigital's Avatar
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    Quote Originally Posted by Stealth915 View Post
    Does everyone use their PSU to power all the components of their CarPC?

    @stealth915

    Please jump back in to this thread as i'm interested in your results thus far.

    I am currently experiencing problems with my USB hubs with what i believe is overload. I current have them connected to 5v cigarette adapters (taken from cell phone chargers). I assumed it would be regulated considering these adapters must do the same for cell phones no?

    Some help is appreciated.
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    Quote Originally Posted by afterdigital View Post
    @stealth915

    Please jump back in to this thread as i'm interested in your results thus far.

    I am currently experiencing problems with my USB hubs with what i believe is overload. I current have them connected to 5v cigarette adapters (taken from cell phone chargers). I assumed it would be regulated considering these adapters must do the same for cell phones no?

    Some help is appreciated.
    A cell phone charger will not be supplying very much current, most likely less than an amp at 5v. While even a 4-port usb hub will need at least 2 amps at 5v to power every port to its full capacity (500ma).

  3. #23
    Variable Bitrate afterdigital's Avatar
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    thanks Mezz64,

    There are still somethings i'm ignorant to; maybe a power supply as Stealth mentions in this thread is the way to go.

    I do have an extra M2-ATX ps lying around. However, if what you say is true, do the 5v railings on the PS provide at least 2 amps?
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  4. #24
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    Quote Originally Posted by afterdigital View Post
    thanks Mezz64,

    There are still somethings i'm ignorant to; maybe a power supply as Stealth mentions in this thread is the way to go.

    I do have an extra M2-ATX ps lying around. However, if what you say is true, do the 5v railings on the PS provide at least 2 amps?
    I believe the M2 5v rail is rated at 5amps if I'm not mistaken.

  5. #25
    Variable Bitrate afterdigital's Avatar
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    echoing on what's been discussed here, i should use the ground of the power supply for my hub's and usb dvd player, yes?

    I was considering going with Stealth's suggestion of grounding all devices directly to chassis, but there is a mixed feedback on this.

    What do you think Mezz?
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  6. #26
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    It all depends where the power is coming from. If you source the +5v for the hub from the M2 then you are much less likely to have any ground loop problems by using the M2 ground since it's likely the M2 ground is somewhat separated from the chassis ground. Using a chassis ground could introduce a ground loop and might provide for noisy power.

    This all however theoretical. You might not have any problems in practice, so try what is most convenient and work from there.

  7. #27
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    Quote Originally Posted by mezz64 View Post
    I believe the M2 5v rail is rated at 5amps if I'm not mistaken.
    5 volt rail is 8 amps compared to the M1-ATX which has 10 amps.

    Also, don't use a relay to turn on your amplifiers, I had the same problem as you and solved it with a 10 cent transistor and much less wiring. I can let you know how to wire it up if you want.
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  8. #28
    Variable Bitrate afterdigital's Avatar
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    @Maheriano thank you.

    @Mezz implied the USB hubs may best be rated at 3amps for proper working conditions. Would 8amps introduce a new set of problems? OR are the hubs able to work with more amps but not less (such as <3amps)?
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  9. #29
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    Quote Originally Posted by afterdigital View Post
    @Maheriano thank you.

    @Mezz implied the USB hubs may best be rated at 3amps for proper working conditions. Would 8amps introduce a new set of problems? OR are the hubs able to work with more amps but not less (such as <3amps)?
    I device only draws as much current as it needs. Having a supply capable of 8amps will not pose a problem.

  10. #30
    Variable Bitrate afterdigital's Avatar
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    Quote Originally Posted by mezz64 View Post
    I device only draws as much current as it needs. Having a supply capable of 8amps will not pose a problem.
    thank you for sharing your knowledge.

    In pursuit of having a carpc that works 100% or close to it, i've learned a lot.

    I'm off to install my second M2 PS as a USB HUB's and DVD power generator!
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