Current through USB bus
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From: markus reichelt on 6 May 2010 13:00 * Merciadri Luca <Luca.Merciadri(a)student.ulg.ac.be> wrote: > How can I know how much current goes through each USB port for its > related device(s)? Thanks. Via software: zero chance. You need to measure the current directly at the port in question while the device attached to it is in use. How that is done exactly is up to you. You can fiddle with the cables yourself, get an adapter (I'm sure there's one out there), go visit an electronics geek. What you probably meant to ask is what the specification says. And that is stated just there ;-) You can safely assume that the hardware can handle what's listed in the specs. -- left blank, right bald
From: Aioanei Rares on 6 May 2010 13:10 On 05/06/2010 07:51 PM, Merciadri Luca wrote: > Hi, > > How can I know how much current goes through each USB port for its > related device(s)? Thanks. > > You can use a voltmeter; after all, it's working with electricity.... -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BE2F617.9010205(a)gmail.com
From: Ryan Manikowski on 6 May 2010 13:10 On 5/6/2010 1:02 PM, markus reichelt wrote: > * Merciadri Luca <Luca.Merciadri(a)student.ulg.ac.be> wrote: > > >> How can I know how much current goes through each USB port for its >> related device(s)? Thanks. >> > Via software: zero chance. > <snip> Check the manufacturer website and obtain a copy of the manual for your motherboard manual. It should have the voltage that each USB port outputs listed. Some manufacturers require that a jumper be set in order to increase/decrease the voltage output supplied by a specific group of ports. -- Ryan Manikowski ]] Devision Media Services LLC [[ www.devision.us ryan(a)devision.us | 716.771.2282 -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BE2F5F1.2030506(a)devision.us
From: Mike Dresser on 6 May 2010 13:20 On Thu, 6 May 2010, Merciadri Luca wrote: > Hi, > > How can I know how much current goes through each USB port for its > related device(s)? Thanks. Try lsusb -v There will be a MaxPower listed for the device -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/alpine.DEB.1.10.1005061259300.13801(a)router.windsormachine.com
From: Camaleón on 6 May 2010 13:20
On Thu, 06 May 2010 13:00:19 -0400, Mike Dresser wrote: > On Thu, 6 May 2010, Merciadri Luca wrote: > >> Hi, >> >> How can I know how much current goes through each USB port for its >> related device(s)? Thanks. > > Try lsusb -v > > There will be a MaxPower listed for the device Nice! :-) stt008:~# lsusb -v | grep Power Self Powered MaxPower 0mA Self Powered Self Powered MaxPower 0mA Self Powered Self Powered MaxPower 0mA Self Powered Self Powered MaxPower 0mA Self Powered Self Powered MaxPower 0mA Self Powered (Bus Powered) MaxPower 100mA <<-- usb flash drive attached (Bus Powered) Self Powered MaxPower 0mA Self Powered Self Powered MaxPower 0mA Self Powered Self Powered MaxPower 0mA Self Powered Greetings, -- Camaleón -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/pan.2010.05.06.17.17.03(a)gmail.com |