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How do car computers work when you start them and some other questions?

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  • How do car computers work when you start them and some other questions?

    Like, when you start your car, will you have to wait a couple minutes for the computer to load up or is it pretty quick?

    and those shutdown controllers, do they allow you to just turn off the car and stuff? and the computer will shut down safely?

    the computers connect to the battery correct? do they still use the computer power supplies? or does it use modified ones?

  • #2
    check out the faqs there or different ways of doing this, quick and not so quick. do a search about 'boot time' and xplite and you'll find more.
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    • #3
      heh... i see you're a regular at bit-tech. :-)
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      • #4
        How fast does your computer turn on when you push the on button?

        Shutdown controller does just what its name says.. Works like an amplifier, turn key off, remote signal is lost, computer goes into shutdown mode.

        Link to a DC-DC power supply:
        http://www.mp3car.com/store/product_...roducts_id=171

        Look in the mp3car.com store for more w/ info.(click on the logo at the top left).
        Jim
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        • #5
          here are some links:

          Start here is has everything you could want:
          http://www.mp3car.com/vbulletin/foru...e=2&order=desc

          This one talks about which power supply to get:
          http://www.mp3car.com/vbulletin/showthread.php?t=68636

          This one is more info one power supplys:
          http://www.mp3car.com/vbulletin/showthread.php?t=51060

          This one is about DIY startup/shutdown controller
          http://www.mp3car.com/vbulletin/showthread.php?t=54143
          You know you're an engineer if you have no life & can prove it mathematically.

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          • #6
            did you just check out bit-tech or something?

            so with that one psu you linked, does the mobo plug into that? where does it connect to the battery? you put the controller before it right?

            in the power supply link it says eventually a pc WILL drain your battery in a few days, so how do you prevent this?

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            • #7
              Originally posted by Bboy_jon
              in the power supply link it says eventually a pc WILL drain your battery in a few days, so how do you prevent this?
              I didn't read the link supplied but the battery shouldn't die since the computer is only running for a minute or so after the car is shut off...

              A basic shutdown controller does the following...

              You shut the car off

              the controller loses power on the acc lead

              controller starts an internal timer for killing the constant 12v lead

              controller shorts out what is hard wired to the power button on the computer

              pc starts the shutdown process

              controller timer eventually reaches 0 which cuts the 12v lead in case the computer didn't shut down successfully

              controller waits again for the acc lead to be powered

              ----

              Some may be different but thats the general idea...
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              • #8
                well in the link it says

                Vehicle batteries can provide a limited amount of electricity to your devices. Even if your computer is completely OFF, a PC will still consume a few hundered milliwatts, needed to monitor PC ON/OFF status. When the computer (car pc) is in the suspend/sleep mode, it will consume even more power, because the RAM needs to be powered at all times. The power consumption in the suspend mode is few watts. No matter how big your car battery is, a PC will eventually drain your vehicle's battery in a matter of days.
                but i think maybe its just for suspend mode?

                so boot time takes around 30sec to a min or so right?

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                • #9
                  yeah i'm not sure how many people use sleep or suspend mode but I personally use hibernate. coming out of hibernate my computer is usually booted by the time i'm out of the driveway and start going down the road (18-23 seconds?)
                  1997 Saturn SL2 Car PC Status [..........] 0% Complete (Removed)
                  1999 Honda Accord Car PC Status [::::::::..] 80% Complete (Setting up software before final install)

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                  • #10
                    i always check out bit-tech for ideas and just to see how crazy those guys are with there amazing installs. puts most of ust to shame really. I saw the thread about car pc's and i recognized your name

                    as far as it draining your battery that is only in suspend mode. hibernate or complete shutdown wont drain your battery (at least using the m1-atx, the opus .. unless modified, will eventually drain your battery from what i remember)

                    I do a complete shut down and now it's taking a lot longer to boot (well maybe not boot but from the time i start the car to the time centrafuse starts to play musice) since i installd the obd-ii and bluetooh. the more streamlined your set up os the faster you'll be able to boot.

                    also the search keywords i provided you will shed a lot of light on how to get faster boot times.
                    New System in progress:
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                    Phaze TD1500 ~> Dynaudio MD130
                    Phaze TD1500 ~> Seas g18rnx/p
                    Zapco Ref 500.1 ~ 12" tc-9
                    Behringer DCX2496 ~ Envision Electronics psu
                    Transflective Xenarc

                    My Car Pc Install
                    My Boat Pc worklog

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                    • #11
                      if u use a good start up/shutdown controller, it will consume no voltage when the system is shutdown, the su/sd controller will turn all power off to the mobo after the mobo turns off the power supply. the power supply returns power just before appling the startup signal to the mobo
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                      • #12
                        Originally posted by Bboy_jon
                        well in the link it says



                        but i think maybe its just for suspend mode?

                        so boot time takes around 30sec to a min or so right?
                        You can also use standby, i use that and the system is playing music in 4-6 seconds.
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                        • #13
                          Originally posted by Bboy_jon
                          well in the link it says



                          but i think maybe its just for suspend mode?

                          so boot time takes around 30sec to a min or so right?
                          I hibernate to disk and when I start mine up, I'm playing music in under 20 sec.
                          Have you looked in the FAQ yet?
                          How about the Wiki?



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