Page 2 of 2 FirstFirst 12
Results 11 to 20 of 20

Thread: Solved: USB bus stays powered after shutdown

  1. #11
    Maximum Bitrate tom2112's Avatar
    Join Date
    Nov 2003
    Location
    Sharon, PA
    Posts
    507
    OK, maybe I'm dumb, but wouldn't it be easier to just use a powered USB hub (12 volt of course). Hook the powered hub to the ACC line, so it's only on when the car is on or in accessory mode. You'd also need to cut the USB cable that runs from the motherboard to the USB hub, severing the 5v feed, but leaving the data connections. That way no power is drawn from the motherboard, only the ACC line for USB devices plugged into the hub. This way you could plug your GPS (for instance) directly into the motherboard, so it's always powered, and your USB DVD drive into the hub, so it's only powered while the car is on.

    Does that make sense? Or am I missing something?

    TIA,
    Tom
    So far:
    M10000 Nehemiah, 1Gb RAM, Opus 90w PS, Buffalo Tech WLI2-USB2-G54, 160 Gb HDD, GlobalSat BU-353 GPS, iGuidance, Zippy EL-610, Panasonic CW8123B Slim Slot CDRW/DVD, 10" Lilliput, Sony XA-300, Sony CDX-MP30 Head, OBD-II

  2. #12
    Raw Wave
    Join Date
    Jun 2003
    Posts
    1,823
    OK, maybe I'm dumb, but wouldn't it be easier to just use a powered USB hub (12 volt of course).

    NO

    Because you will loose the power to the USB devices as soon as you take the key out. Shutdown controller do have some delay before shutting down as soon as the ignirion is gone.

    What if the PC is trying to write to the USB HDD before shutting down? but you already took the power away from it?

    I guess, yes it can work for some setup

  3. #13
    Constant Bitrate
    Join Date
    Sep 2003
    Location
    Northeast Ohio
    Posts
    114
    tom2112,
    Thank you for posting what I was trying to ask.

    Ricky327,
    NO ...

    I guess, yes it can work for some setup
    Thanks for clearing this up.
    System:
    Epia M1000 w/512MB PC2100, Xenarc 700TS, ATI 7500 PCI, OPUS 150 PSU, 2.5 40GB 5400 HDD, 802.11g PCI, Slim Slot DVDR,
    Gyration RF Kybrd, OBDII adpt. + sftwr, XP pro, iGuidance/Royaltek GPS NAV, XMPCR, Kenwd KAC-8401 4 chnl amp, 10" pwd sub

  4. #14
    FLAC mbkowns's Avatar
    Join Date
    Mar 2004
    Location
    SOCAL
    Posts
    1,141

    Lightbulb

    Quote Originally Posted by Ricky327
    OK, maybe I'm dumb, but wouldn't it be easier to just use a powered USB hub (12 volt of course).

    NO

    Because you will loose the power to the USB devices as soon as you take the key out. Shutdown controller do have some delay before shutting down as soon as the ignirion is gone.

    What if the PC is trying to write to the USB HDD before shutting down? but you already took the power away from it?

    I guess, yes it can work for some setup

    just wire it to your car alarm then when you chirp your car its off and when you chirp chirp is on simple and easy and i really hope most of you have a car alarm of some sort with this expensive hardware ......

    I want to wire my car computer to my alarm hmm adding a usb hub lets see

    1. Chirp Chirp ( ON ) > turn on carputer with the Power-SW pinouts + a relay to turn on the usb hub.

    2. Chirp ( OFF ) > turn off carputer with the Power-SW pinouts + a relay to turn off the usb hub.

    Also if you didn't want to wire it directly to the unlock/lock function of your car alarm alot of them have a accessory feature like the clifford ones do. **** you could even do this! one to turn on / turn off and one to reset the carputer.


    How cool would that be! Just make sure you arm your car most of us do but you could also wire a itps so if forget it kills the power.

    Cool also if your in your house and you want to sync some music over just power it on (remote start would be better for this though) and copy over and power down.
    2005 Ford Mustang GT <- - - UPDATED PICTURES

    2003 KAWASAKI Z1000 - CUSTOM MODZ

    MBK (AIM = IllMBKllI)

  5. #15
    Newbie
    Join Date
    Jan 2004
    Posts
    6

    The DSSC circuit will fix this easily...

    The DSSC startup / shutdown controller will solve this easily. It has a master relay that completely pulls power to the PC. It solves these USB issues.

    You can see it over at:
    http://www.dashpc.com/

    Click on the DSSC circuit link.

    Best regards,
    CB

  6. #16
    Newbie
    Join Date
    Feb 2006
    Posts
    9
    sorry to bring up an old post but im having the same prob ....woke up today to a dead battery. i have a shuttle skg41 running off an opus 150 psu. an all usb devices still get power after going into standby.

    so rather than splicing in relays and diodes etc.....as i have an external usb hub that is powered from the 5v rail (hdd molex connector) if i simply severe the two usb power wires going from the motherboard to the hub will it not consume any power once the pc shuts down? if so this would be alot easier.

  7. #17
    Variable Bitrate Nerd2's Avatar
    Join Date
    Dec 2006
    Location
    Bristol/Cambridge, England
    Posts
    237
    Does the opus not have a feature that shuts off all power after a period of time? That's what the M2 ATX does.

  8. #18
    Newbie
    Join Date
    Feb 2006
    Posts
    9
    besides the delayed shutdown controller i dont think there is a jumper setting to turn off all power else it would not come back from standby.

  9. #19
    Constant Bitrate DJKhan85's Avatar
    Join Date
    May 2004
    Location
    Boston, Mass
    Posts
    173
    OPUS does not shut off power completely as per ATX specs. I implemented the relay circuit a wicked long time ago and it works like a charm.
    Computer:
    COMPLETE SYSTEM OVERHAUL!!!!!!
    STAY TUNED IN THE UPCOMING WEEKS!

  10. #20
    Maximum Bitrate S4Per's Avatar
    Join Date
    Jan 2004
    Location
    Seattle, WA
    Posts
    782
    if i simply severe the two usb power wires going from the motherboard to the hub will it not consume any power once the pc shuts down? if so this would be alot easier.
    i think it's hit or miss...the processor on the hub may still need those power lines to function correctly. you could always try; USB cables are cheap.

    not sure if this has been mentioned: you can send in the opus to have it modified so it no longer suplies power to the board when it's shut down. at this point, though, you can no longer use standby (only hibernate or full shut down).

Page 2 of 2 FirstFirst 12

Similar Threads

  1. Best mountable, DC powered USB Hubs?
    By Dan Marsh in forum General Hardware Discussion
    Replies: 24
    Last Post: 05-19-2010, 03:34 PM
  2. Replies: 197
    Last Post: 06-15-2006, 09:47 PM
  3. Epia USB Stays On
    By jnusaira in forum General Hardware Discussion
    Replies: 14
    Last Post: 04-05-2004, 01:01 PM
  4. OPUS 150 watt, USB stays powered???
    By GScherler in forum Power Supplies
    Replies: 1
    Last Post: 12-19-2003, 03:44 PM
  5. USB Sound and Bus powered hub
    By Suprapc in forum General Hardware Discussion
    Replies: 10
    Last Post: 04-21-2003, 04:21 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •