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Thread: Using M3-ATX for VIA EPIA N800-10E

  1. #1
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    Using M3-ATX for VIA EPIA N800-10E

    Hi guys,

    I am planning to start a double-din pc project and get this mobo:

    http://www.e-itx.com/n800-10e.html

    I am thinking to deploy a M3-ATX for it. But since the mobo doesn't have a ATX connector (but a P4 12V), a gentleman at mini-box.com told me that I need to short PS_ON to turn the PSU on.

    So my question is if I short PS_ON permanently, does it mean the PSU will be always on? Can I still make use of the motherboard ON pulse in this case? If I really need to short PS_ON will it draw more current than it should even if my mono is turned off (when ignition off)?

    Any help is greatly appreciated.

    Thanks,
    -Ivan

  2. #2
    FLAC SNOtwistR's Avatar
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    Hey welcome to the forum! I think you would be better off using the DC-DC-USb power supply. http://store.mp3car.com/Intelligent_..._p/pwr-034.htm It will turn on with ignition and also send the pulse to mainboard for power up. Very simple solution and you don't short mainboard permently you only short for a touch that is what the pulse is, you can tie into the jumper wire from power supply to mainboard and add another momentary switch (normally open) if you want some extra control up front . Hope this helps and keep us posted with a worklog on your project SNO

  3. #3
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    Thanks for your reply SNO. DC-DC USB does look like a better choice for my project. I have 3 questions:

    1. Looking at the mechanical drawing, looks like it will fit to the bybyte nano itx case. Anyone has experience that it won't fit or hard to fit?
    2. The max current of 12V is 8A. Does it sound enough to drive -both- my mobo and lilliput 669 HB?
    3. I am thinking the Vaux may be used to turn on a 12V relay for my amp. So I can script it and add a delay before Vaux goes high correct? I am reading the advanced configuration manual and I guess it should be doable. Just want to confirm whether there's any practical issue.

    Thanks,
    -Ivan

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    So from the operating guide of N800:

    http://resources.e-itx.com/via-epia-...A-N800_100.pdf

    and the following page about 669HB:

    http://www.lilliputlcd.com/2011/02/26/hello-world/

    it seems like the total current would be around 1.925 + 0.65 ~= 2.6A. I think there's a pretty safe margin if I want to drive them both using the 12V rail from DC-DC USB?

  5. #5
    FLAC SNOtwistR's Avatar
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    Yes you should have plenty of power, it's not really big in size and should fit somehow into that case. Glad I was some help. SNO

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    Awesome. Thanks for your information SNO. My mono will arrive by this week, and I will place an order of the PSU after confirming linux is happy with the mono.

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    DCDC-USB-200 "Anti-Thump" Amplifier remote control setup

    Hi Ivanwyc,

    did you succeed to connect DCDC-USB-200 to your mainboard,

    I have the same problem like you : as I have a thin mini-itx Intel chipset motherboard, which I want to use for a car pc project.
    This motherboard has a DC connector for 12V or 19V settable through jumpers.

    I decided to use for it as power supply the same board as you DCDC-USB-200.

    Could you please indicate me if this board has a setting option for an "Anti-Thump" Amplifier remote control, in order to connect to my car amplifier, I saw also in the advanced users manual that there is a VAUX which can be programmed - do you think th can be used as an "Anti-Thump" Amplifier remote control in order o avoid the big pop noise when the carpc starts?

    Thanks very much

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    Hi esilviu,

    I had a similar question and found this thread:

    http://www.mp3car.com/car-audio/1457...-question.html

    According to the comment by Curiosity, Vaux will do it. I haven't tested it yet: I just got my DCDC USB a couple days ago and don't have access to any Windows box. The linux utility doesn't look as comprehensive as the one for Windows, so I can't test it until I find a Windows machine. I will try to do it over the weekend.

    Thanks,
    -Ivan

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    esilviu, so I have played with my DCDC USB today. It's true that Vaux can be programmed to start with a delay. But it's only possible in script mode. In script mode, ignition is a hard on/off switch of the PSU, which means when ignition goes low, Vout and Vaux will be out immediately. We don't have the off-delay and hard-off as we do in automotive mode. I didn't test PWR because there's no meaning of it when Vout is out immediately after ignition goes low.

    However there's one unknown automotive setting in the "Settings" section: "Automotive Mode: Thump timeout". And the description is "THUMP timeout, switching off the audio amplifier during motherboard startup/shutdown":

    Name:  Screen Shot 2013-11-24 at 3.04.11 AM.png
Views: 208
Size:  41.5 KB

    This is undocumented in both the basic and advanced manual. I suspect it's one of the pins near the state LED. But again, it's not documented. Does anybody have an idea? I may want to send en enquiry to mini-box since they have 30 days support.

    Having said that, I found an amp on ebay and looks like it doesn't need the anti-thump thing?

    Code:
    http://www.ebay.com/itm/DC-12V-TDA7850-Car-Amplifier-Digital-AMP-4-channel-BA3121-Denoiser-ACC-Control-/390691050107
    Note: "Delay function,no need to add speaker protection"

    I don't really understand what does that mean, but it sounds quite interesting to me. Does anybody have an idea?

    Thanks,
    -Ivan
    Last edited by ivanwyc; 11-24-2013 at 07:14 PM. Reason: The ebay rover link doesn't work… put it in a code tag instead

  10. #10
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    Yes I read the comments on the link you provided , and Curiosity confirmed it should work with the help of a relay or 2 resistors and a transistor similar with the explanations in the pdf from the next link: http://www.mpegbox.com/microsdc/usdc20d_AuxOC.pdf , also Robert confirmed in the comments on the link: http://www.mp3car.com/power-supplies...-200-info.html
    Please let us know your testing results and impressions on this PSU, also am interested if this PSU is introducing some noises (interference) in your sound system, especially if your radio still has good reception after your carpc starts with this PSU. Robert had only good experience with this PSU, powering its carpc
    Thanks very much,

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