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how to give energy to USB devices? with notebook off!!!



 
 
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  #1  
Old September 9th 03, 04:24 PM
andrea rossi
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Default how to give energy to USB devices? with notebook off!!!

Is there something to use to give energy to USB devices?

For example if I want to use my USB calculator when my notebook is off,
there's a device (for example with battery) to give energy?

Thanks



  #2  
Old September 9th 03, 05:55 PM
Jim Turner
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On Tue, 9 Sep 2003 17:24:05 +0200, "andrea rossi"
wrote:

Is there something to use to give energy to USB devices?

For example if I want to use my USB calculator when my notebook is off,
there's a device (for example with battery) to give energy?

Thanks


Get a self powered USB hub
  #3  
Old September 9th 03, 09:21 PM
Marc Reinig
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Since the hub itself is a USB device, and the hub will not be enumerated by
the powered off laptop, the downstream ports should remain unpowered.

Marc Reinig
System Solutions

"Jim Turner" wrote in message
s.com...
On Tue, 9 Sep 2003 17:24:05 +0200, "andrea rossi"
wrote:

Is there something to use to give energy to USB devices?

For example if I want to use my USB calculator when my notebook is off,
there's a device (for example with battery) to give energy?

Thanks


Get a self powered USB hub



  #4  
Old September 9th 03, 11:05 PM
Jim Turner
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Default

On Tue, 09 Sep 2003 20:21:44 GMT, "Marc Reinig"
wrote:

Since the hub itself is a USB device, and the hub will not be enumerated by
the powered off laptop, the downstream ports should remain unpowered.

Marc Reinig
System Solutions

"Jim Turner" wrote in message
ws.com...
On Tue, 9 Sep 2003 17:24:05 +0200, "andrea rossi"
wrote:

Is there something to use to give energy to USB devices?

For example if I want to use my USB calculator when my notebook is off,
there's a device (for example with battery) to give energy?

Thanks


Get a self powered USB hub


Depends on the hub and the device. Devices, such as keyboards and network
adapters are powered so they can wake up the system even when it is
"off". .

  #5  
Old September 10th 03, 12:34 AM
Marc Reinig
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Can you tell me which USB keyboards or USB network adapters can wake a
Windows PC when the PC is turned off or which Windows PC keeps USB power on
when they are shut off?

We're not talking about standby, we're talking about OFF. Perhaps you are
thinking of the ability to turn on a MAC through the keyboard? I don't
think the above things are possible in Windows.

Marc Reinig
System Solutions

"Jim Turner" wrote in message
s.com...
On Tue, 09 Sep 2003 20:21:44 GMT, "Marc Reinig"
wrote:

Since the hub itself is a USB device, and the hub will not be enumerated

by
the powered off laptop, the downstream ports should remain unpowered.

Marc Reinig
System Solutions

"Jim Turner" wrote in message
ws.com...
On Tue, 9 Sep 2003 17:24:05 +0200, "andrea rossi"


wrote:

Is there something to use to give energy to USB devices?

For example if I want to use my USB calculator when my notebook is

off,
there's a device (for example with battery) to give energy?

Thanks


Get a self powered USB hub


Depends on the hub and the device. Devices, such as keyboards and network
adapters are powered so they can wake up the system even when it is
"off". .



  #6  
Old September 10th 03, 02:11 AM
Jim Turner
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Can't give specifics right now. I know that various multimedia keyboards
that are USB and have the power button on them from Microsoft, Logitech,
and some others will wake up motherboards I have tried it on from ASUS,
ECS, and MSI, although don't have specifics handy right now. Just have to
have legacy USB support on in the BIOS, and a real ATX system. Modern ATX
systems don't completely power off unless you pull the plug or throw the
switch on the back of some power supplies. The 5vsb voltage is there to
the PS/2 ports and some USB ports. Have seen some of the optical mice
with the lights on and the system "off".

JT

PS. haven't done anything with Macs for years.
On Tue, 09 Sep 2003 23:34:24 GMT, "Marc Reinig"
wrote:

Can you tell me which USB keyboards or USB network adapters can wake a
Windows PC when the PC is turned off or which Windows PC keeps USB power on
when they are shut off?

We're not talking about standby, we're talking about OFF. Perhaps you are
thinking of the ability to turn on a MAC through the keyboard? I don't
think the above things are possible in Windows.

Marc Reinig
System Solutions


  #7  
Old September 10th 03, 06:45 AM
Phrederik
external usenet poster
 
Posts: n/a
Default


"Marc Reinig" wrote in message
. ..
Can you tell me which USB keyboards or USB network adapters can wake a
Windows PC when the PC is turned off or which Windows PC keeps USB power

on
when they are shut off?

We're not talking about standby, we're talking about OFF. Perhaps you are
thinking of the ability to turn on a MAC through the keyboard? I don't
think the above things are possible in Windows.

Marc Reinig
System Solutions


MANY computers keep the USB ports (and PS/2 ports) powered from the 5v SBY
.... that's why it's there. These devices can turn on a PC that has been shut
down (not put to sleep)


  #8  
Old September 10th 03, 06:30 AM
Steve Reinis
external usenet poster
 
Posts: n/a
Default

Got an HP Pavilion 8790 (Athlon 950) based on an Asus K7M Motherboard and it
has a fancy HP USB keyboard. When the system is OFF (Not asleep), I can
power up the system by tapping the spacebar.

Got an older Asus P2L97 motherboard (PII 400) that has a PS/2 keyboard
attached... Can power it up with the spacebar. Same goes with an USB
keyboard... Spacebar powers it up.


Marc Reinig wrote in message
. ..
Can you tell me which USB keyboards or USB network adapters can wake a
Windows PC when the PC is turned off or which Windows PC keeps USB power

on
when they are shut off?

We're not talking about standby, we're talking about OFF. Perhaps you are
thinking of the ability to turn on a MAC through the keyboard? I don't
think the above things are possible in Windows.

Marc Reinig
System Solutions

"Jim Turner" wrote in message
s.com...
On Tue, 09 Sep 2003 20:21:44 GMT, "Marc Reinig"
wrote:

Since the hub itself is a USB device, and the hub will not be

enumerated
by
the powered off laptop, the downstream ports should remain unpowered.

Marc Reinig
System Solutions

"Jim Turner" wrote in message
ws.com...
On Tue, 9 Sep 2003 17:24:05 +0200, "andrea rossi"


wrote:

Is there something to use to give energy to USB devices?

For example if I want to use my USB calculator when my notebook is

off,
there's a device (for example with battery) to give energy?

Thanks


Get a self powered USB hub

Depends on the hub and the device. Devices, such as keyboards and

network
adapters are powered so they can wake up the system even when it is
"off". .





  #9  
Old September 9th 03, 10:26 PM
kony
external usenet poster
 
Posts: n/a
Default

On Tue, 9 Sep 2003 17:24:05 +0200, "andrea rossi"
wrote:

Is there something to use to give energy to USB devices?

For example if I want to use my USB calculator when my notebook is off,
there's a device (for example with battery) to give energy?

Thanks


Yes, you could buy something like this
http://www.goldenshop.com.hk/AI-trad/pc/pc_usbpower.htm
or just build your own... not terribly hard since you just need a
small 5V wall-wart and a USB outlet from (anything).


Dave

 




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