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Thread: sx270 power usage

  1. #1
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    sx270 power usage

    Anyone know how many watts the sx270 normally uses up? i'm thinking about using the DSX12VD (http://store.mp3car.com/ProductDetai...Code=PWR%2D025) and wonder if the 140 watts going to be enough.

    i am going to run a creative live external usb sound card, microsoft GPS, odbii scan tool and a few other small things that would take a few more watts here and there.

    thanks

  2. #2
    Constant Bitrate ivanmx6's Avatar
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    That should be fine.
    The Dell power block is rated at 12V, 12.5A max but the PC only draws about 8A normally. (At bootup it can peak to about 12A.)

    The DSX12VD can supply 12V, 12A under normal conditions, 15A peak.

    I'm going to use one with my SX260.

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    I too just bought an SX270

    I haven't connected mine in the car yet but I noticed using my 140W inverter for my laptop that it would not power my Dell laptop, maybe because the laptop batteries were 1/2 charged. I'll test out my Sx270 when i return home.

  4. #4
    Constant Bitrate ivanmx6's Avatar
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    I've had a chat with Jeff Mucha at MpegBox.com (maker of the DSX12VD) and have come to the conclusion that the DSX12V (not VD) would be better for use with the SX260 or SX270.

    One of the functions in the Dell BIOS allows for "switch on when power resumes". Using the dumb DSX12V with a switch on Vin would just switch on the Dell whenever the Vin switch was made.

    No need for any fancy timers, G1/G2 power button switching or 5v sensing - just use Hibernate to bring the Dell down then switch off after. That way you get a nice fast bootup next time. And if the worst comes to it, you can always use the Vin switch to quickly bring the whole thing down (dirtily).

    I've already bought the DSX12VD unfortunately, but am going to set it up exactly like that this afternoon.
    Ken

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    Constant Bitrate ivanmx6's Avatar
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    Got mine all fitted up now.

    DSX12VD is powering the SX260 with its power hungry P4/2.4, Belkin USB adapter and BU-353 GPS very nicely.

    I ended up wiring it up like this so it's all controlled by one dash switch:
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  6. #6
    One Sharp Cheddar ThunderStick's Avatar
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    Quote Originally Posted by ivanmx6 View Post
    Got mine all fitted up now.

    DSX12VD is powering the SX260 with its power hungry P4/2.4, Belkin USB adapter and BU-353 GPS very nicely.

    I ended up wiring it up like this so it's all controlled by one dash switch:
    In your setup,
    Wont this cut the power dead to the computer before it has a chance to shutdown. As soon as the switch is switched off all power to the PSU is cut.
    Not exactly recommended. ehe
    I would leave the main hot from the battery not relayed fromthe 12v accessory or remote switch and just leave it hot. Just control the shutdown procedure via the shutdown controller.
    It will work much better.
    Using a power interupt option works but is kind of hokey when you try to startup. Your computer may not appreciate a hard shutdown. Nor will your screen. I noticed using my Dynamix 7" touchscreen if I cut power to it while in use it doesnt turn on correctly everytime. Now I have one with an auto on feature and voila it works much cleaner and consistent.
    Do it right and you will be much more satisfied.
    I do agree with using the 12v PSU though, great idea. Just not the relay on the hot wire. Not a great idea.
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  7. #7
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    the way i plan to set mine up is...

    connect power and ground to a fuse , then through a switch to the PC power...

    when u shutdown the PC normally , turn off the switch ... when u turn on the switch the PC should automatically bootup because the Dells power systems reconsises that the power has been reconeccted.

  8. #8
    Constant Bitrate ivanmx6's Avatar
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    Quote Originally Posted by ThunderStick View Post
    In your setup,
    Wont this cut the power dead to the computer before it has a chance to shutdown. As soon as the switch is switched off all power to the PSU is cut.
    Not exactly recommended. ehe
    I would leave the main hot from the battery not relayed fromthe 12v accessory or remote switch and just leave it hot. Just control the shutdown procedure via the shutdown controller.
    It will work much better.
    Using a power interupt option works but is kind of hokey when you try to startup. Your computer may not appreciate a hard shutdown. Nor will your screen. I noticed using my Dynamix 7" touchscreen if I cut power to it while in use it doesnt turn on correctly everytime. Now I have one with an auto on feature and voila it works much cleaner and consistent.
    Do it right and you will be much more satisfied.
    I do agree with using the 12v PSU though, great idea. Just not the relay on the hot wire. Not a great idea.
    I always Hibernate the PC and wait for that to finish before shutting the power off. The power switch is not connected to Acc so is always hot. Just got to remember not to leave it switched on when I get out.
    That's why I'm building a modified "lights on" buzzer - when I switch the ignition off and the PSU is still on it buzzes at me.


    Quote Originally Posted by mrluke View Post
    the way i plan to set mine up is...

    connect power and ground to a fuse , then through a switch to the PC power...

    when u shutdown the PC normally , turn off the switch ... when u turn on the switch the PC should automatically bootup because the Dells power systems reconsises that the power has been reconeccted.
    You'll have fun finding a switch good enough for 15A Luke.

    And the Dell auto power on works fine.

  9. #9
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    Quote Originally Posted by ivanmx6 View Post
    Got mine all fitted up now.

    DSX12VD is powering the SX260 with its power hungry P4/2.4, Belkin USB adapter and BU-353 GPS very nicely.

    I ended up wiring it up like this so it's all controlled by one dash switch:
    Ivan, thank you for your post, it's excellent. did you use the existing power cord or solder the wires in side the chassie. let me know if that makes sense.

  10. #10
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    Quote Originally Posted by ivanmx6 View Post
    I always Hibernate the PC and wait for that to finish before shutting the power off. The power switch is not connected to Acc so is always hot. Just got to remember not to leave it switched on when I get out.
    That's why I'm building a modified "lights on" buzzer - when I switch the ignition off and the PSU is still on it buzzes at me.




    You'll have fun finding a switch good enough for 15A Luke.

    And the Dell auto power on works fine.
    just so ya know my carpc is near enough all set up now , just wiring a switch to the Amp.

    the switch i used was actually 25amp believe or not


    only thing that needs sorting now is screen interfearnce

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