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Thread: M2-ATX Wiring/ Keeping your carputer powered.

  1. #1
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    M2-ATX Wiring/ Keeping your carputer powered.

    In advance, I apologize if this appears in a faq somwhere.

    buuuuuuuut...

    I will be receiving an m2-atx in the next few days. Do I need to use the ignition line? I'm not terribly familar with car wiring (I did install my in dash lcd but I don't want to get too far in to it). I wonder if I could just wire it 12v & ground and use the physical switch option? or does that have something to do with basic need I bought this for (surviving changing voltages like my plug in inverter doesn't)?

    I read the PDF but it doesn't seem to mention this.

    -Darien, engine on...check plugs.... check Turn on monitor... check "oooo it's on the LCD... wait why is it rebooting?...every 10 seconds?'

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    Quote Originally Posted by DarienZaxxon
    In advance, I apologize if this appears in a faq somwhere.

    buuuuuuuut...

    I will be receiving an m2-atx in the next few days. Do I need to use the ignition line? I'm not terribly familar with car wiring (I did install my in dash lcd but I don't want to get too far in to it). I wonder if I could just wire it 12v & ground and use the physical switch option? or does that have something to do with basic need I bought this for (surviving changing voltages like my plug in inverter doesn't)?

    I read the PDF but it doesn't seem to mention this.

    -Darien, engine on...check plugs.... check Turn on monitor... check "oooo it's on the LCD... wait why is it rebooting?...every 10 seconds?'
    First, what the hell does "-Darien, engine on...check plugs.... check Turn on monitor... check "oooo it's on the LCD... wait why is it rebooting?...every 10 seconds?'" mena?

    Secondly, have you tried to contact the manufaturer or the seller, they might be able to help.

    Most people ust hook up the ignition sense wire. It is soooo simple, there is no reason not to. You just run a wire to an ignition wire (like for your LCD) and run it to the PS. What is sooo scary.

    Really, this hobby isn't for everyone. One of the requirements is that you be somewhat o.k. with computers, electronics, and car wiring. If this is too much, perhaps you should seek professional installation help.

    BUT, it is really simple. You should be able to do this VERY EASILY.

    To answer the question though, I am unsure. MAYBE someone has tried what you are suggestion, and you will get lucky, and they wil find this thread and post. Otherwise, I would try to contact the manufacturer.


    Michael
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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    Quote Originally Posted by DarienZaxxon
    In advance, I apologize if this appears in a faq somwhere.

    buuuuuuuut...

    I will be receiving an m2-atx in the next few days. Do I need to use the ignition line? I'm not terribly familar with car wiring (I did install my in dash lcd but I don't want to get too far in to it). I wonder if I could just wire it 12v & ground and use the physical switch option? or does that have something to do with basic need I bought this for (surviving changing voltages like my plug in inverter doesn't)?

    I read the PDF but it doesn't seem to mention this.

    -Darien, engine on...check plugs.... check Turn on monitor... check "oooo it's on the LCD... wait why is it rebooting?...every 10 seconds?'
    Welcome to our addictive hobby.

    It is in the PDF. Maybe just not very well documented.

    If you want to use a physical switch, put the switch in between 12v and the IGN/ACC input of the M2-ATX. You will still get the low-voltage cutoff protection (at 11.2v) as well as be able to survive crank (down to about 8v).

    Or tap the ACC line from the headunit harness or cigarette adapter for automatic turn-on/off.

    No idea on your rebooting problem. Need more data to be able to help.

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    Maximum Bitrate yrean's Avatar
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    buy yourself a volt meter. find youself a constant 12v. some people come directly from the battery for this. I removed my head unit so i grabbed my 12v from where the radio was. anyhow, find a constant 12v. find a ground you can find that in the harness that goes to the radio also. and then find yourself an accesory turn on., easiest way with a volt meter. find a ground for the meter negative, and then test for a wire that has 12v with the ignition key on. then turn the ignition off, and the volts should drop to 0. or really really close to it. wire the turn on to there. If your using an amp, wire the remote turn on for the amp up to the M2ATX. then you put the 2 pin wire from the m2atx to the motherboard power button leads. and then you put your power button on the m2atx.

    What it will do is when you turn your car on, it will turn your pc on.. then if you use the amp lead(if you need an external amp) it will wait a bit and turn your amp on without a thud. when you setup windows you have it turn off or hibernate when the power buttons pressed. so when you turn off the car. the m2atx presses the power button and your pc will shut down automaticly.

    the m2atx has a nice startup shutdown controller. why not use it? to set it how you want theres jumper settings. you can find them in the pdf. Im not sure if i helped or confused you. let me know what you dont understand and ill clarify some.
    MII12000 | 512MB PC3200 | 60GB 2.5" Samsung
    M2-ATX 160W PS | SlotLoad DVD/CDRW | BU353 GPS
    7" Lilliput 619 | WinTV | WIFI | Bluetooth
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  5. #5
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    Quote Originally Posted by yrean
    buy yourself a volt meter.
    Good Idea

    Quote Originally Posted by yrean
    find youself a constant 12v. some people come directly from the battery for this. I removed my head unit so i grabbed my 12v from where the radio was.
    VERY BAD IDEA. Please refrain from giving bad ideas. The radio harness is NOT capable of supplying the proper amount of amperage for a carputer. Ya, it MIGHT work, and I am sure it has in the past, but it is a VERY BAD idea.

    Quote Originally Posted by yrean
    anyhow, find a constant 12v. find a ground you can find that in the harness that goes to the radio also. and then find yourself an accesory turn on., easiest way with a volt meter. find a ground for the meter negative, and then test for a wire that has 12v with the ignition key on. then turn the ignition off, and the volts should drop to 0. or really really close to it. wire the turn on to there. If your using an amp, wire the remote turn on for the amp up to the M2ATX. then you put the 2 pin wire from the m2atx to the motherboard power button leads. and then you put your power button on the m2atx.

    What it will do is when you turn your car on, it will turn your pc on.. then if you use the amp lead(if you need an external amp) it will wait a bit and turn your amp on without a thud. when you setup windows you have it turn off or hibernate when the power buttons pressed. so when you turn off the car. the m2atx presses the power button and your pc will shut down automaticly.

    the m2atx has a nice startup shutdown controller. why not use it? to set it how you want theres jumper settings. you can find them in the pdf. Im not sure if i helped or confused you. let me know what you dont understand and ill clarify some.
    He is mostly right, you should use the M2 features.

    Piabu, I think you missed his point, though maybe I did.

    He wants to totally forgo connecting the accessory wire because it is too hard to run, and just install a switch to turn the computer on and off, instead of it being done automatically. I do not believe that is covered in the manual at all.

    Michael
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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    If you remove all jumpers from the ABCD header, then the M2 will ignore the IGN line. So yes, it will turn on and off with the switch like a normal computer, but you will lose features such the time delay hard-off.

    This is where Piabu's suggestion comes in. If you put a switch between the 12v+ post on the M2 and the IGN post on the M2, then you've created a fake IGN line of which you have complete control, without having to tap into your car's actual IGN line. No wire run involved (besides the switch wires which the OP wants anyway, though it's arguably just as difficult a run).

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    Quote Originally Posted by Wiredwrx
    He wants to totally forgo connecting the accessory wire because it is too hard to run, and just install a switch to turn the computer on and off, instead of it being done automatically. I do not believe that is covered in the manual at all.
    If hooking up the ACC input on the M2-ATX is really "too hard", then I concur with you that we may need more education for newcomers on the pre-requisites for this hobby.

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    Maximum Bitrate yrean's Avatar
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    Quote Originally Posted by Wiredwrx
    VERY BAD IDEA. Please refrain from giving bad ideas. The radio harness is NOT capable of supplying the proper amount of amperage for a carputer. Ya, it MIGHT work, and I am sure it has in the past, but it is a VERY BAD idea.
    i work on electronics and computerized machinery for a living. the line to a radio is fused. so if you try to pull more power then is possible for the awg, then the fuse will blow(unless you try to put a bigger fuse on that line which IS a bad idea). Im positive the line will support more then you need for a small pc. you dont need a straight line with 0awg. You have your opinion. I have mine. lets just leave it at that.
    MII12000 | 512MB PC3200 | 60GB 2.5" Samsung
    M2-ATX 160W PS | SlotLoad DVD/CDRW | BU353 GPS
    7" Lilliput 619 | WinTV | WIFI | Bluetooth
    Audigy2 ZS | HQCT | Kyocera KR1 Mobile Router(3G)
    Roadrunner | LSXvoid | IGuidance 3


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    Quote Originally Posted by yrean
    i work on electronics and computerized machinery for a living. the line to a radio is fused. so if you try to pull more power then is possible for the awg, then the fuse will blow(unless you try to put a bigger fuse on that line which IS a bad idea). Im positive the line will support more then you need for a small pc. you dont need a straight line with 0awg. You have your opinion. I have mine. lets just leave it at that.
    The M2-ATX is a 160w DC-DC power supply. Let us assume efficiency at 95%. That is a possible draw of (160/0.95/12) = ~14A peak draw on the input. The M2-ATX itself is fused at 15A.

    Most car cigarette adapters and radio harness wiring are rated at 10A and fused accordingly. And that assumes you are powering just the M2-ATX and no headunits, amps, phone chargers, etc off that wiring.

    Just because it will work in typical scenarios does not mean it will survive worst-case scenarios. Personally for myself the cost of running the extra wiring is worth the insurance against troubleshooting blown fuses (or worse, melted wires with fire risk) at a later point in time.

  10. #10
    Maximum Bitrate yrean's Avatar
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    i was talking about with no head unit. I did say enough to power a small pc. i guess i didnt make that clear. and if you draw more then the fuse can handle or try to . .. the fuse will blow, there is no melting of wires. basically to be able to use that line you do have to do calculations on how much the line can handle and how much you will need for the system youve built. But as for saying its a bad idea? if you do your math right and build the system right it isnt. its not for everyones systems, but if done correctly it is fine. If your getting into this sort of project you should have some clue as to what your doing, and do your homework before you begin.

    my response was to this statment. "VERY BAD IDEA. Please refrain from giving bad ideas. The radio harness is NOT capable of supplying the proper amount of amperage for a carputer." which is only true for SOME systems. in my particular application that statement is false.

    My system after doing the math can run thru the factory harness. but when i built the system i went for low power consumtion and draw.

    BTW. most cars, have seperated fused lines for radio and accessories(ie. cigerrete lighters) especially most cars in the last ten years as more and more people are using there accessories for invertors, adaptors, power chargers etc.

    This topic is even argued in the FAQ section under wiring. there is no definite answer. It is system/car specific whether you can or not.

    Ill ask you one simple question. Can you run a laptop off an AC invertor from a cigarette lighter? we all know the answer to that question since a **** load of people do it. the same people charge thier phones and run radar detectors from the same line at the same time. So please.... tell me how what we do is different?
    MII12000 | 512MB PC3200 | 60GB 2.5" Samsung
    M2-ATX 160W PS | SlotLoad DVD/CDRW | BU353 GPS
    7" Lilliput 619 | WinTV | WIFI | Bluetooth
    Audigy2 ZS | HQCT | Kyocera KR1 Mobile Router(3G)
    Roadrunner | LSXvoid | IGuidance 3


    My Worklog

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