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  • Auto-On Laptop?

    Here's my *cheap* MP3 plan for my trunk:

    Pentium III Laptop (10 gig hard drive, 2500 mp3's)
    FM Broadcaster (plugged into laptops speaker output)
    DOS-based MP3 player (configured in autoexec.bat)
    Power inverter for laptop & FM broadcaster

    My only question is this...

    Is there a way to have the laptop power on by itself when I turn on the ignition? (And shut off when the ignition is off.)

    Thanks for any help or suggestions.

  • #2
    NO unless you want to tap into the power button and hook up some relay circuit to it.
    iGMon - Integration between iGuidance and Road Runner
    CFX - Skin for Road Runner

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    • #3
      Check out my post in the newbie forum (350z carputer - any thoughts) I have thought about this long and hard...

      Depending on your laptop it may be possible to have it switch off automatically a set amount of time after it loses power from the external source (i.e. your car when you switch the engine off).

      Getting it to turn on is more troublesome - if you can get hold of a docking station, you could hardwire the start button on that to your ignition.

      If you have the feature on your laptop, you may be able to initiate a 'wake-on-usb' command and have your laptop power up in response to a button press on your controller (mouse/trackball etc) through the usb port. If that doesn't work, most laptops have a wake-on-lan/ring then you simulate an incoming call to start it up (if you search the boards you should be able to find plenty more on this topic...)

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      • #4
        Originally posted by PK!
        Depending on your laptop it may be possible to have it switch off automatically a set amount of time after it loses power from the external source (i.e. your car when you switch the engine off).

        ...

        If you have the feature on your laptop, you may be able to initiate a 'wake-on-usb' command and have your laptop power up in response to a button press on your controller (mouse/trackball etc) through the usb port. If that doesn't work, most laptops have a wake-on-lan/ring then you simulate an incoming call to start it up (if you search the boards you should be able to find plenty more on this topic...)
        Every laptop should be able to shutdon after losing power for X minutes, you just change the power settings on it within windows. Easy.

        Starting up is harder, I've never heard of wake on USB, and probably hardly anything supports it. Wake on LAN is a b1tch cause you gotta send a specific packet.. Wake on Ring is easiest, you just short the 2 pins that connect with an incoming call using a relay and you're done.

        Or hack the power switch and use a DSSC (run a search on it). Or buy one that's already done from someone here..

        -arebelspy
        See my trades here! My For Sale/Trade Thread. Email joe at eipse.com
        Originally posted by xdjxklusivex
        i think every thread is now a whoreing thread

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        • #5
          The couple laptops that i have around only support a lot of the "wake on X" features if the computer is CONTINUOUSLY hooked up to power while it is off (I wish I woulda known that before I bought the damn thing) and the same goes for the lid switch. Of couse, it all depends on the computer in question.

          Like a lot of others, I have run wires to the power switch, which are connected to a switch under the dash (for manual operation) and a relay that operates as a momentary switch to turn on the computer when I start the car, using this circuit.

          |V1 Virtual Display|

          Hard work often pays off over time, laziness always pays off right now.

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          • #6
            [QUOTE=zPilott]The couple laptops that i have around only support a lot of the "wake on X" features if the computer is CONTINUOUSLY hooked up to power while it is off (I wish I woulda known that before I bought the damn thing) and the same goes for the lid switch. QUOTE]

            I'll check to see if that's the case with my laptop - that said I don't think it'd be a problem to keep it connected to a continuous supply? (see thread below)

            http://www.mp3car.com/vbulletin/show...er+consumption

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            • #7
              Then you crank your car, power is removed, and wake on X doesn't work...

              -arebelspy
              See my trades here! My For Sale/Trade Thread. Email joe at eipse.com
              Originally posted by xdjxklusivex
              i think every thread is now a whoreing thread

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              • #8
                [QUOTE=PK!]
                Originally posted by zPilott
                The couple laptops that i have around only support a lot of the "wake on X" features if the computer is CONTINUOUSLY hooked up to power while it is off (I wish I woulda known that before I bought the damn thing) and the same goes for the lid switch. QUOTE]

                I'll check to see if that's the case with my laptop - that said I don't think it'd be a problem to keep it connected to a continuous supply? (see thread below)

                http://www.mp3car.com/vbulletin/show...er+consumption

                The power drain may be minimal (keep in mind you also need to take into account the drain from your power supply, and some or all of your USB devices, again, depending on your computer) and it may not be a problem for you. If you do leave it attached all the time, you are then going to have to come up with another solution to have it shutdown/suspend when you turn off the car (so you would be trading easy startup for easy shutdown).

                |V1 Virtual Display|

                Hard work often pays off over time, laziness always pays off right now.

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                • #9
                  Originally posted by arebelspy
                  Starting up is harder, I've never heard of wake on USB, and probably hardly anything supports it.
                  Macs have wake on USB. That's how I get mine to wake up. I sleep it by either cutting power with the lid closed, or manually.

                  Rob.

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                  • #10
                    Originally posted by gommino
                    Macs have wake on USB. That's how I get mine to wake up. I sleep it by either cutting power with the lid closed, or manually.

                    Rob.
                    So you don't have a problem with the fact the power isn't continuously on for wake-on-USB then?

                    (i guess this is fairly new technology and is something fairly pc specific)

                    With regard to turning the machine off (if it has constant power) could always write a batch job and assign it to a button/key depending on your front end and/or input device.

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                    • #11
                      I have a packard bell (i know!) laptop and i have wired into the lid switch, linked this through a realy to my inigition and a switch. when the switch is off the realy is controled by the key - you turn the key off - the pc thinks the lid has been shut - goes into standby. turn the key on - all back to life again.
                      If you flick the switch the pc stays on all the time.
                      i have left it in standby on the car battery for a 2 week vacation and all still worked fine but all my usb devices are on powered hubs which switch on and off also, be aware some systems still seem to power the usb devices when in standby and this will drain you battery quicker.

                      My power button is on a realy also, this is rigged up to a spare ouput on my alarm so it can startup/shutdown when i arm/disarm or i can control it with a button on my key fob. i only use this when windoze bu**ers up and i have to re-boot though.
                      PB 2.0Ghz, 20GB, 512mb, XPpro. 300GB Usb HDD, Griffin pwrmate, m-audio audiophile fw. BU-353 gps. 2x100w sony amps, 1x150w JBL sub amp, MBQuart front components, 6x9 rear, 10" sub. Audiocontrol epcienter, esp2, 3xs. Clifford G5, Finished, fitted, problems

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                      • #12
                        Originally posted by PK!
                        So you don't have a problem with the fact the power isn't continuously on for wake-on-USB then?
                        No because the power is restored before computer gets woken by USB activity.

                        Rob.

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                        • #13
                          Some people have bought docking stations for their laptops and soldered relays to the startup switch to signal startup/shutdown.
                          Originally posted by ghettocruzer
                          I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
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                          • #14
                            I would really try to remove the FM modulator from the system, and look along the lines of AUX in on the headunit. I would also look for a 12v to laptop (15 - 26volt) power supply. Try Maplin if you are in the UK, they have them at around £20.
                            www.debthelpexpert.org

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