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09-03-2004, 08:12 AM
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#1
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Constant Bitrate
Join Date: Aug 2004
Posts: 184
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Cutting power to USB after computer has shutdown
My computer will keep supplying power to USB devices even when the computer itself is not on. If I use a self power USB HUB and take the 5V out from OPUS to power the hub, when I turn the ACC off and trigger the OPUS to turn off my computer, will it cut the power to the USB hub as well ?
With nothing connected to the USB port, does it still drain battery ?
Does the OPUS cut off power to the computer after a period of time after it trigger the computer to shutdown ? Or does it still supply power to the computer but just trigger it to shutdown ?
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09-03-2004, 08:41 PM
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#2
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Constant Bitrate
Join Date: Apr 2004
Posts: 216
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If you have a 150W it'll always power STDBY and USB devices on.
If you have a 90W all you do is take the jumper of and it won't.
__________________
I'll spout simplistic opinions for hours on end.
Ridicule anyone who disagrees with me,
and generally foster divisiveness,
cynicism and lower level of public dialog!
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09-04-2004, 06:22 PM
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#4
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Constant Bitrate
Join Date: Aug 2004
Posts: 184
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For the 90watt OPUS. At what point does it switch off the 5V ? When the ACC trigger is off ? or wait after the preset shutoff time ?
So say my computer will shutdown after 20 min after the ACC trigger is off. At this point OPUS will trigger my computer to shutdown and cut off power to the 5v line ?
Kind of getting all confused again !
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09-04-2004, 08:06 PM
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#5
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Constant Bitrate
Join Date: Aug 2004
Location: Arlington, VA
Posts: 220
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On the Opus 90w there's a jumper option to cut the 5v, and I believe it does so as soon as the PC is off.
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09-05-2004, 06:30 AM
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#6
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Newbie
Join Date: Jan 2004
Posts: 14
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Also you might want to try a USB hub they turn my lights off my usb mouse and keyboard
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09-05-2004, 10:15 AM
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#7
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Variable Bitrate
Join Date: Aug 2004
Location: Sydney
Posts: 280
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1 question but what if u have 150 opsu and usb still stays on does it metter and will it damage the screen or drain the batter ?
tnx
__________________
[|||||-----] 95% complete
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09-05-2004, 11:48 AM
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#8
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Raw Wave
Join Date: Mar 2004
Location: Redondo Beach, CA
Posts: 1,969
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Quote: Originally Posted by LanoX
1 question but what if u have 150 opsu and usb still stays on does it metter and will it damage the screen or drain the batter ?
tnx
No, it shouldn't damage your screen nor anything else in your system. It may drain or cause long term damage to your battery.
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09-05-2004, 01:58 PM
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#9
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Constant Bitrate
Join Date: Aug 2004
Location: Arlington, VA
Posts: 220
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Do the inline ATX relay/diode mod in that thread that has already been referenced. It'll stop your system from draining your battery.
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09-05-2004, 11:36 PM
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#10
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Registered User
Join Date: Mar 2003
Location: Rohnert Park, CA
Posts: 1,122
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do usb devices really use enough power to drain a battery?
i have my lilliput touchscreen and keyboard hooked up to a usb hub
would these devices drain?
i have a m10000 and a 150w opus
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09-05-2004, 11:56 PM
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#11
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Constant Bitrate
Join Date: Aug 2004
Location: Arlington, VA
Posts: 220
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Quote:
do usb devices really use enough power to drain a battery?
YES, if you don't start your car every day. The motherboard standby takes power too!
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09-05-2004, 11:58 PM
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#12
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My Village Called
Join Date: Jul 2004
Location: Berkeley, CA
Posts: 10,517
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I think that there is an option in the bios that disable power to USB.
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09-05-2004, 11:59 PM
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#13
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Registered User
Join Date: Mar 2003
Location: Rohnert Park, CA
Posts: 1,122
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well ****
that may be why my car battery keeps dying....
im not really competent with making circuits and things; should i just sell my 150w and get a 90?
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09-06-2004, 12:06 AM
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#14
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Constant Bitrate
Join Date: Aug 2004
Location: Arlington, VA
Posts: 220
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Build the relay mod. It's not that hard, really. 
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09-06-2004, 12:11 AM
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#15
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My Village Called
Join Date: Jul 2004
Location: Berkeley, CA
Posts: 10,517
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