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10-20-2004, 10:17 PM
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#1
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Low Bitrate
Join Date: Jan 2003
Location: Westland, MI
Posts: 57
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powering usb hub
I have a 7-port externally powered hub and want to power it from my car (not from the computer). I can't seen to find a simple 12v to 5v adapter - any ideas ?
Thanks
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10-20-2004, 10:26 PM
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#2
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Raw Wave
Join Date: Dec 2003
Location: not sure yet.
Posts: 2,218
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Does your mobo have a 5v thingy on it?
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10-20-2004, 10:27 PM
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#3
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Phat Boy
Join Date: Sep 2003
Location: AZ
Posts: 1,007
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take a 5v line from your PSU silly! THat is unless you have a laptop, or your hub takes more 5v.
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10-21-2004, 12:09 AM
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#4
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Low Bitrate
Join Date: Jan 2003
Location: Westland, MI
Posts: 57
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I don't want to overload the power supply - I have lots of usb devices .
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10-21-2004, 12:37 AM
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#5
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Variable Bitrate
Join Date: Jun 2004
Location: Central California
Posts: 367
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Quote: Originally Posted by finnman925
I don't want to overload the power supply - I have lots of usb devices .
I use this for mine: http://www.e-preview.com/products/ch...pter/index.htm .
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10-21-2004, 12:43 AM
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#6
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Variable Bitrate
Join Date: May 2004
Location: Denmark
Posts: 333
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Quote: Originally Posted by finnman925
I have a 7-port externally powered hub and want to power it from my car (not from the computer). I can't seen to find a simple 12v to 5v adapter - any ideas ?
Thanks
You can use a chip from maxim as you can get as free part 
the chip is MAX831 8-30 volt in 5 volt 1 amp out
PDF data sheet
hop you can use it 
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03-21-2005, 08:51 AM
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#7
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Constant Bitrate
Join Date: Dec 2004
Location: Netherlands
Posts: 129
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Any ideas? Im using a laptop and have a 4 ports hub, but all my devices are messing around when all 4 are in use so i think need to external power the hub. I need to have a sigaretlighter 12v to 5v with 2amps. I searched around but could find a good solution.
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03-22-2005, 04:17 AM
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#8
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Newbie
Join Date: Mar 2005
Location: Yakima, WA, USA
Posts: 39
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Quote: Originally Posted by edikp
very promising... where to buy? and have you had any issues with using this as apower source?
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03-22-2005, 04:35 AM
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#9
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Constant Bitrate
Join Date: Dec 2004
Location: Netherlands
Posts: 129
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This only seems to power a usb device, not a hub. So you can charge batteries of usb devices.
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03-22-2005, 04:47 AM
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#10
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Newbie
Join Date: Mar 2005
Location: Yakima, WA, USA
Posts: 39
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Right, but if it's a stable 5v output what's to stop you from chopping it up, and splicing it to a power plug?
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03-22-2005, 07:06 AM
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#11
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Constant Bitrate
Join Date: Dec 2004
Location: Netherlands
Posts: 129
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You're right. I just ordered an Asus MyPal car adapter for A620. It has 5V A2 output, so it must be good to, only 15 euro.
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03-22-2005, 06:49 PM
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#12
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Variable Bitrate
Join Date: Jan 2005
Location: Melbourne, Australia
Posts: 347
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solution: buy 2 X 4 port hubs that dont require a external power source.. slimline ones cost about $15 each
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03-25-2005, 08:19 PM
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#13
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Raw Wave
Join Date: Oct 2004
Posts: 3,453
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Quote: Originally Posted by edikp
I'm going to have to give that a try as well.
Just tried tapping into the 5v from my Opus 150 for the 7-port hub and couldn't get the PC to power up. As soon as I disconnected the hub it powered up again just fine.
Oh well. It's only *another* $15 expenditure..
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03-26-2005, 02:14 AM
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#14
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Variable Bitrate
Join Date: Jun 2004
Location: Ipswich, UK
Posts: 310
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Quote: Originally Posted by vxcarpc
solution: buy 2 X 4 port hubs that dont require a external power source.. slimline ones cost about $15 each
Why would that help if the issue is not enough power from the USB ports on his laptop to power 4 USB devices?
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03-26-2005, 02:15 AM
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#15
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Variable Bitrate
Join Date: Jun 2004
Location: Ipswich, UK
Posts: 310
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Quote: Originally Posted by Curly_cat
Why would that help if the issue is not enough power from the USB ports on his laptop to power 4 USB devices?
Sorry, two questions in one thread. 
I take it you were replying to the first one!
__________________
: Jetway J7F2 1.5Ghz Mainboard : Cubid 3688 : CarNetix CNX-P1260 :
: Netgear 802.11g PCMCIA : 2 x LinITX 7" Screens :
: BU353 USB GPS Mouse : Panasonic UJ845 DVDRW :
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