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  • Power USB Hub with M2?

    I will be installing my CarPC within the next month.
    Currently I have a
    voomPC Case
    M2-ATX
    Via MII-10000
    1Gb Ram
    80 Gb HD
    Holux 271 (GPS)
    Lilliput 7" touchscreen
    USB WiFi
    USB Bluetooth
    USB to HU (Car2PC adapter)
    USB External HD 2.5"
    7 Port DLink USB Hub

    I know I will power the LIlliput off the 12V Rail of the M2-Atx power supply. But I also want to power the USB Hub.
    The USB Hub has a 5V 3A Requirement to power. So If I connect the 5V from the M2-Atx, will this work? or will it fry the USB Hub?

    According to M2-Atx

    Maximum Power Characteristics
    Output Rail - Current (Max) - Current Peak (<60 seconds) - Regulation
    5V 8A 12A 1.5%
    3.3V 8A 12A 1.5%
    5VSB 1.5A 2A 1.5%
    -12V 0.15A 0.2A 5-%
    12V 8A 9A 2 %

    It says the 5V rail has 8A, will that be too many amps?
    on a side note what is the difference of 5V and 5VSB? Besides the obvious difference in Amps.
    Thanks.

    Arty

  • #2
    Just what I would do:
    Stick an ampmeter between your M2 and your mobo (probably going to have to cut something) and see how much your pulling with every thing on and running. If you have less than 3A draw on the +5v you can make the call to run it off the power supply or not, its your choice to live with.

    If I were in your situation (I will be when I get back to my truck), I would look around here in the hardware fourms and see if you can find a simple +5v power supply. If you can build it, it may be your best option.

    +5v is your normal +5v rail. +5vSB is your +5 stand by voltage, it is what powers your computer so that a PSON signal can be applied. Dont draw anything off of that, probably not a wise idea.

    And your device will only pull as many Amps as it needs, the M2 can supply up to 8A continuous, but depending what you have on it, it may only be pushing 3A to power those devices.
    It works!!

    Almost all of the time too!

    Comment


    • #3
      Originally posted by Arty13 View Post
      I will be installing my CarPC within the next month.
      Currently I have a
      voomPC Case
      M2-ATX
      Via MII-10000
      1Gb Ram
      80 Gb HD
      Holux 271 (GPS)
      Lilliput 7" touchscreen
      USB WiFi
      USB Bluetooth
      USB to HU (Car2PC adapter)
      USB External HD 2.5"
      7 Port DLink USB Hub

      I know I will power the LIlliput off the 12V Rail of the M2-Atx power supply. But I also want to power the USB Hub.
      The USB Hub has a 5V 3A Requirement to power. So If I connect the 5V from the M2-Atx, will this work? or will it fry the USB Hub?

      According to M2-Atx

      Maximum Power Characteristics
      Output Rail - Current (Max) - Current Peak (<60 seconds) - Regulation
      5V 8A 12A 1.5%
      3.3V 8A 12A 1.5%
      5VSB 1.5A 2A 1.5%
      -12V 0.15A 0.2A 5-%
      12V 8A 9A 2 %

      It says the 5V rail has 8A, will that be too many amps?
      on a side note what is the difference of 5V and 5VSB? Besides the obvious difference in Amps.
      Thanks.

      Arty
      Why would it fry the usb hub?

      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.

      Comment


      • #4
        5v power to USB hub

        My USB hub is powered directly from the 5v rail on the M2atx. Works fine here... Dont know if it is supposed to work though!
        My v70 carputer worklog...
        CarTFT MM400 | ASUS N4L-VM DH | Intel Core Solo T1300 1.66 GHz
        2 * Kingston 512 pc2 5300 | Seagate Momentus 5400 100 gb
        G.Mouse BU-353 | M2-ATX |
        Running Streetdeck

        Comment


        • #5
          I was thinking along the same lines except that the M2 would fry (if overloaded) as opposed to the hub. That's why i bought a AC powered USB hub and will power it with an inverter that i already have.
          ****************************************
          OLD SYSTEM (DEAD)
          Intel D945GCLF2 Dual Core ATOM
          Lilliput 7" 629GL 2008 LED Backlight
          BU-353 USB GPS Receiver / iGuidance / IGO8
          M2-ATX Power Supply
          RideRunner Front End / Various Skins
          Windows XP SP3

          Comment


          • #6
            Would I be able to add a resister to the 5V rail to bring down the Amps to 3?

            Also what harms can come out of running the 5V with the max 8Amps to the hub?

            But otherwise my main/real option should be finding/building an external 5V/3A powersupply to power the usb hub?

            Thanks again.

            Arty

            Comment


            • #7
              Originally posted by Arty13 View Post
              Would I be able to add a resister to the 5V rail to bring down the Amps to 3?

              Also what harms can come out of running the 5V with the max 8Amps to the hub?

              But otherwise my main/real option should be finding/building an external 5V/3A powersupply to power the usb hub?

              Thanks again.

              Arty
              ONCE AGAIN, why would the HUB fry.

              Think of it. If, as you seem to think, that ANY device taking power from the M2 will EAT UP/TAKE/CONSUME/USE ALL of the available amps the M2 has, then as soon as you connect a Hardrive, or MB, or Screen, to the M2, NOTHING ELSE WOULD WORK, BECAUSE THERE IS NO MORE AMPS TO TAKE. Or better yet, if you power your home computer with a 350 watt, or 500 watt PS, UNLESS THE SYSTEM IS EXACTLY 500 watts, then poof, your system is toast cause the M2 is gonna FORCE ALL THAT AMPERAGE into the system

              Come on man, think a little.

              Better yet, READ THE DAMN FAQ, cause I explain this myself in the faq section.

              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.

              Comment


              • #8
                Sorry if my questions come out stupid, I did read the faq, but I have other people telling me different things. Maybe they dont know what they are talking about.
                And I should of stated my 'Frying' more clear. I didn't mean the USB Hub alone, I was trying to state that what could "fry" by hooking all the stuff together.

                Here's a different question regarding M2 and max Amps.
                When it says 12V 8Amps Max and 5V 8Amps Max, does that mean each rail has a max of 8Amps, or is that saying the M2 only produces a max of 8Amps total?

                Comment


                • #9
                  Originally posted by Arty13 View Post
                  Sorry if my questions come out stupid, I did read the faq, but I have other people telling me different things. Maybe they dont know what they are talking about.
                  ...
                  Here's a different question regarding M2 and max Amps.
                  When it says 12V 8Amps Max and 5V 8Amps Max, does that mean each rail has a max of 8Amps, or is that saying the M2 only produces a max of 8Amps total?
                  First, DON'T LISTEN TO OTHER PEOPLE. The FAQ is correct, that is why it is a FAQ. If it changes, the FAQ will change. I hope you wouldn't ask a lawyer for advice, and then listen to your friends about the law, or speak to a doctor about a medical condition, but listen to your neighbor about it because "he knows these things" The Faqs were created by "experts", no need to listen to anyone else.

                  You are obviously new to this stuff, and should have posted in the newbie section. I am generally "easier" when people post in the Newbie section.

                  Now, lets look at things logically, when was the last time you saw a Powerr Supply rated by AMPs. Probably never, hell, the M2 says it is 160watts, and most desktop PS are like 350 watts. So, I know that the M2 is 160 watts, and it has 8 amps, what does that all mean? Well, I go to and put in "amps watts", and the first thing that comes up is http://www.powerstream.com/Amps-Watts.htm Of course, you could search THIS forum and find the same thing, but google is easier to use. You would now know that amps*volts=watts So, (12*8)+(5*8)+(3.3*8)=VOILA, 160 watts. Go ahead, if you can find the amp specs for your PS (it is usually on a sticker on the side of the unit, though you might need to open the case to see it) see how the math works out.

                  Now, you said you read the FAQs, and first, well, I don't think ANYONE has actually read all the Faqs, which means you have to search them. I KNOW there is a FAQ about this stuff because I wrote part of the faq. Can you link me to the faq that you felt was relevant to your question but did not actually have the information.

                  To make it easy, I have searched the FAQs and found the relevant posts in the Faq Emporium.

                  First, lets start here http://www.mp3car.com/vbulletin/showthread.php?t=51489

                  We then see
                  "Powering A Car PC
                  1. Power supplies for car PC's EXPLAINED includes description of the most popular power supplies for car PC use.
                  2. Will {insert power supply here} this power supply work with my car PC? An excellent writeup by member Darque Pervert to help demystify the power supply world.
                  3. How to choose a power supply - a writeup at the Carnetix web site. Vendor writeup that includes discussion about the challenges of powering a PC in the automobile.
                  4. How to keep your car from bursting into flames because you picked the wrong size cables: Ensuring you use the proper size cables, Choosing the proper gauge wires
                  5. How to wire an Opus
                  6. How to fix your Opus
                  7. Tips and pitfalls to avoid with your M1-ATX power supply
                  8. How to power your CarPC when it is NOT in the car."

                  All you could ever want to know about carPC power supplies.

                  Then, the thread with the specifics about your question,
                  FAQ: Power Supplies Explained (Part 1) http://www.mp3car.com/vbulletin/showthread.php?t=51060, In particular, this post http://www.mp3car.com/vbulletin/show...01&postcount=4

                  Originally posted by Arty13 View Post
                  And I should of stated my 'Frying' more clear. I didn't mean the USB Hub alone, I was trying to state that what could "fry" by hooking all the stuff together.
                  HUH? Stating means making a statement, usually of fact. "What" implies a question, and is not "compatible" with a statement. Assuming what you mean is "what could "fry" by hooking all the stuff together" Why would something fry because you hooked them all together? I guess maybe the PS could be overloaded and ruined if you tried to pull too much power from it with your system, BUT, that is why you newed to read the faqs, and figure out how to determine what PS you can run on what system. It is called a power calculator, and I can assure you, there is information about power calculators in the FAQ Emporium.

                  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.

                  Comment


                  • #10
                    I didn't read all the posts (kind of in a hurry ) but here's my 2 cents. (sorry if someone already explained this)

                    It's more or less like this:

                    If you're lookingt at a pipe containig water, the Amps are the size of the pipe the Volts are the pressure in the pipe (more or less, the speed of the water inside the pipe)

                    so...

                    you can have issues if the voltage is not correct but
                    for the Amps, as long as you need less than what you have, you're fine:
                    in other words 5v 8A out of the M2 and you need 5v 3A for the hub. The hub will only take what it needs.

                    The M2 is not gonna "force" 8A inside the hub it's just gonna have 8A available to anything you plug in the M2.

                    If the sum of all the devices using the M2 for power is more than 8A, then be careful the M2 is gona overheat and the devices will run on less power tan they require.

                    as I said....my 2 cents...hope it helped

                    JP
                    _____________________________________________


                    If you made your own skin, visit
                    The CAR PC NETWORK SKIN PAGE

                    at the

                    CAR PC NETWORK

                    _____________________________________________

                    Comment


                    • #11
                      Whats up Michaels bum? If its too hard to answer a newbies Q nicely, dont bother and let someone else handle it instead Mr Expert!

                      Comment


                      • #12
                        Originally posted by travb81 View Post
                        Whats up Michaels bum? If its too hard to answer a newbies Q nicely, dont bother and let someone else handle it instead Mr Expert!
                        Wow, you are sooo on the ball, posting weeks after this conversation.

                        What is up my bum is all the static noobs and one post wonders create by asking the same darn question over and over and over again, thinking that the only "proper" post after the question is one that answers the simple question, and the indignant response that almost always follows from the noob because he thinks he DESERVES an answer for some reason.

                        I am not, and in facty no is here, to hold anyones hand an guide them through carputer building. The forum is a resource, NOT tech support. Everyone needs to read the god damned manual when they want to build a carputer. This site is the manual. When you get a new car (assuming you are old enough to drive) you read the manual, consult the index for things you need to know, and read. You don't call the manufacturer to figure out which one is the gas and which one is the brake.

                        Also, if someone doesn't speak concisely or correctly, how can anyone even attempt to help him. What also crawled up my bum is a complete lack of clarity in many peoples posts. Words mean things, and iuf they are used in a way that is confusing, I will ask for clarification. Just like if I were to answer a question incoherently it could lead to catastrophic failure for the OP, posting incomprehensible questions can lead to the same.

                        Besides, that is just the way I am. Some people call it noob bashing, I call it education. Tomato-tomato.

                        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.

                        Comment


                        • #13
                          Michael, I think you´re right...

                          It´s annoying to have people ask the same question over and over again...

                          but if you´re willing to answer the question it´s may be because you are willing to be some sort of educator/teacher to the newbies to this hobbie...right?

                          well, when you go to school and a student ask a question because he doesn´t understand something, the teacher hopefully doesn´t tell him to stop asking question and find his answer in THE book. If that was the case there will be no need to have an education system and people would learn everything at home reading books and probably wouldn´t understand half (best case scenario) of what´s in the book...

                          Also, for that teacher, I´m sure, every year a different student is aking the same question and the teacher doesn´t tell that student to go ask the answer to the first student he answered the question to...right.

                          So yes it´s annoying but if you´re annoyed by it, just don´t waste you re time answering the question and if you do answer it it´s because you re willing to do so and therefore have no reason to bash the guy.

                          On the other hand, I´m still kind of a newbie and every time I have a problem I search first and ask after. The thing is that sometimes searching is not as easy as a google click. For example, the RRmobile plug in, very interesting and usefull thing...right? Well the main thread on it is, I think, about 60 pages times 15 threads by page = 900 threads !!! and most of them are absolutely useless, and there´s NO WAY a newbie OR a vet is gonna read 900 threads to get an answer when they can just ask in the forum. (I know I know I´m pushing it a bit but you see my point)

                          So maybe this guy needed a little shake because he actually didn´t search enough but all I´m saying is that, for newbies, all the answers my not be as easy to find as it seems to you.

                          cheers
                          JP
                          _____________________________________________


                          If you made your own skin, visit
                          The CAR PC NETWORK SKIN PAGE

                          at the

                          CAR PC NETWORK

                          _____________________________________________

                          Comment


                          • #14
                            Excellent Post Jeep. I totally agree.

                            I do have to say that if someone is posting the same question in multiple threads, or not even making an effort to try on his own, I'd get annoyed.

                            BUT if someone is actually trying to figure it out, others shouldn't discourage him.

                            I just finished my carputer (well almost everything....Um...does it ever end?), and since I have done similar projects in the past, I didn't need to ask many questions. I was able to search the forums and discover my own answers.

                            Now there might be some people that are willing to jump into building a carputer, but are starting from a much lower level of experience. I think it is very important to show patience and answer the mind numbing questions over and over (or dont reply at all).

                            Sometimes I think people bash the newbies just to puff up their egos.

                            Comment


                            • #15
                              Originally posted by jeep642 View Post
                              Michael, I think you´re right...

                              It´s annoying to have people ask the same question over and over again...

                              but if you´re willing to answer the question it´s may be because you are willing to be some sort of educator/teacher to the newbies to this hobbie...right?
                              Nope, that is where you went wrong. I am not a teacher. I am part of a community of people who helps support each other. There is a significant difference. I take, or someone takes the time to answer someones question about A. That is WRITTEN AND RECORDED FOR ALL TIME ON THIS FORUM. If you have a question, search the forum. And of course, it is not my JOB to teach. A teacher is paid, it is her job, and responsibility to teach, I have no such obligation.

                              Think of the forum as a library. When was the last time you walked into a library, stood up in the middle, and said, Hey, I need to know about whale sperm (or insert any topic, that is just a random topic I picked out of thin air), and expected someone in the library, or the liubrarian, to sit and explain the whale sperm to you. Perhaps the librarian would point you in the right direction, Books on Whales are in row 12, maybe she would send you to the card catalog and say, look for whale books. That is what I do, I send people to the card catalog, the search function. And while the search function aint that great here, you can use google to search the site, it is quite easy, and has been discussed on the forum several times, you can search for how to do it.

                              This is even more difficult when someone comes into the library and says, I want to know about sperm whale. Does he mean sperm whales, or whale spearm, or whale reproduction. With out being specific, no one knows what the person needs, or where he should go to find the information. Just because you don't like the answer, does not mean the question hasn't been at least dealt with.

                              Now, if some one comes into the forum, and asks a question that has not been answered several times, and I have the answer, I will give it to him. If it is the same ole thing, I will give him the and , since, I AM NOT A TEACHER.

                              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.

                              Comment

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