From: Lars R. <la...@ro...> - 2007-08-29 22:07:31
|
Hi, I guess this may be more of a general linux question, so maybe it doesn't belong on the list, but here goes anyway: My webcam seems to be using 0.20A (total current is 0.33A for all the hardware), which is more than I'd like it to use. I only use it to take a picture once every day, so it seems a shame to use so much current for nothing. Is there a way I can turn it off completely (shutting down the capture program doesn't seem to be enough) by shutting down the usb port, and then starting it up again when I need it? Best regards, Lars ------------------------------------------------- |
From: Christopher G. <mo...@gm...> - 2007-08-29 22:59:34
|
Is your webcam the only USB client you have attached to your board? You may try removing the usbcore and other usb and video related modules using modprobe -r, but I think it is quite unlikely that this would disable the USB port itself. You could install a switch for your webcam. Are you looking for a software only solution? 2007/8/29, Lars Roland <la...@ro...>: > > Hi, > > I guess this may be more of a general linux question, so maybe it doesn't > belong > on the list, but here goes anyway: > > My webcam seems to be using 0.20A (total current is 0.33A for all the > hardware), > which is more than I'd like it to use. I only use it to take a picture > once > every day, so it seems a shame to use so much current for nothing. > > Is there a way I can turn it off completely (shutting down the capture > program > doesn't seem to be enough) by shutting down the usb port, and then > starting it > up again when I need it? > > Best regards, > Lars > > ------------------------------------------------- > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > -- Christopher Gilbert B.S., Computer Science University of Maine 2006 http://motomastyle.com |
From: <48...@la...> - 2007-08-30 15:25:45
|
I hope someone has a software solution for this... I have been planning to go with a relay for the power and a solid state switch for the signal. I already have on hand: latching relays (Digikey PN 255-1776-5-ND) relay drivers (Digikey PN MDC3105LT1GOSCT-ND) solid state switches (Digikey PN NLAS2066USOSCT-ND) These will be driven by GPIO. Hope this helps.... James > Is your webcam the only USB client you have attached to your board? > > You may try removing the usbcore and other usb and video related modules > using modprobe -r, but I think it is quite unlikely that this would > disable > the USB port itself. > > You could install a switch for your webcam. Are you looking for a software > only solution? > > 2007/8/29, Lars Roland <la...@ro...>: >> >> Hi, >> >> I guess this may be more of a general linux question, so maybe it >> doesn't >> belong >> on the list, but here goes anyway: >> >> My webcam seems to be using 0.20A (total current is 0.33A for all the >> hardware), >> which is more than I'd like it to use. I only use it to take a picture >> once >> every day, so it seems a shame to use so much current for nothing. >> >> Is there a way I can turn it off completely (shutting down the capture >> program >> doesn't seem to be enough) by shutting down the usb port, and then >> starting it >> up again when I need it? >> >> Best regards, >> Lars >> >> ------------------------------------------------- >> >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by: Splunk Inc. >> Still grepping through log files to find problems? Stop. >> Now Search log events and configuration files using AJAX and a browser. >> Download your FREE copy of Splunk now >> http://get.splunk.com/ >> _______________________________________________ >> gumstix-users mailing list >> gum...@li... >> https://lists.sourceforge.net/lists/listinfo/gumstix-users >> > > > > -- > Christopher Gilbert > B.S., Computer Science > University of Maine 2006 > http://motomastyle.com > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> > http://get.splunk.com/_______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Lars K. R. <la...@ro...> - 2007-08-31 11:07:19
|
Hi James, If you have found a good tutorial or some simple instructions on how to do this, please pass me a link. Haven't found a wiki page on controlling a relay from the verdex. I have a console-vx card, and it appears there are some GPIO outputs there (though they seem to be used for something else also???) Best regards, Confused Lars 48...@la... wrote: > I hope someone has a software solution for this... > > I have been planning to go with a relay for the power and a solid state > switch for the signal. > > I already have on hand: > > latching relays (Digikey PN 255-1776-5-ND) > relay drivers (Digikey PN MDC3105LT1GOSCT-ND) > solid state switches (Digikey PN NLAS2066USOSCT-ND) > > These will be driven by GPIO. > > Hope this helps.... > > James > > >> Is your webcam the only USB client you have attached to your board? >> >> You may try removing the usbcore and other usb and video related modules >> using modprobe -r, but I think it is quite unlikely that this would >> disable >> the USB port itself. >> >> You could install a switch for your webcam. Are you looking for a software >> only solution? >> >> 2007/8/29, Lars Roland <la...@ro...>: >> >>> Hi, >>> >>> I guess this may be more of a general linux question, so maybe it >>> doesn't >>> belong >>> on the list, but here goes anyway: >>> >>> My webcam seems to be using 0.20A (total current is 0.33A for all the >>> hardware), >>> which is more than I'd like it to use. I only use it to take a picture >>> once >>> every day, so it seems a shame to use so much current for nothing. >>> >>> Is there a way I can turn it off completely (shutting down the capture >>> program >>> doesn't seem to be enough) by shutting down the usb port, and then >>> starting it >>> up again when I need it? >>> >>> Best regards, >>> Lars >>> >>> ------------------------------------------------- >>> >>> >>> ------------------------------------------------------------------------- >>> This SF.net email is sponsored by: Splunk Inc. >>> Still grepping through log files to find problems? Stop. >>> Now Search log events and configuration files using AJAX and a browser. >>> Download your FREE copy of Splunk now >> http://get.splunk.com/ >>> _______________________________________________ >>> gumstix-users mailing list >>> gum...@li... >>> https://lists.sourceforge.net/lists/listinfo/gumstix-users >>> >>> >> >> -- >> Christopher Gilbert >> B.S., Computer Science >> University of Maine 2006 >> http://motomastyle.com >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by: Splunk Inc. >> Still grepping through log files to find problems? Stop. >> Now Search log events and configuration files using AJAX and a browser. >> Download your FREE copy of Splunk now >> >> http://get.splunk.com/_______________________________________________ >> gumstix-users mailing list >> gum...@li... >> https://lists.sourceforge.net/lists/listinfo/gumstix-users >> >> > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > |
From: <48...@la...> - 2007-09-05 19:43:22
|
Lars, I do not have a tutorial. Nor have I designed the circuit that will be used for this.... However, I intend to use GPIO to drive the relay drivers which in turn drive the relays. The solid state switches can be driven directly from the GPIO. I do not know what IO is available on the Console-VX board. I intend to use the breakout-vx board. Sorry for the dirth of information. James > Hi James, > > If you have found a good tutorial or some simple instructions on how to > do this, please pass me a link. Haven't found a wiki page on controlling > a relay from the verdex. I have a console-vx card, and it appears there > are some GPIO outputs there (though they seem to be used for something > else also???) > > Best regards, > Confused Lars > > 48...@la... wrote: >> I hope someone has a software solution for this... >> >> I have been planning to go with a relay for the power and a solid state >> switch for the signal. >> >> I already have on hand: >> >> latching relays (Digikey PN 255-1776-5-ND) >> relay drivers (Digikey PN MDC3105LT1GOSCT-ND) >> solid state switches (Digikey PN NLAS2066USOSCT-ND) >> >> These will be driven by GPIO. >> >> Hope this helps.... >> >> James >> >> >>> Is your webcam the only USB client you have attached to your board? >>> >>> You may try removing the usbcore and other usb and video related >>> modules >>> using modprobe -r, but I think it is quite unlikely that this would >>> disable >>> the USB port itself. >>> >>> You could install a switch for your webcam. Are you looking for a >>> software >>> only solution? >>> >>> 2007/8/29, Lars Roland <la...@ro...>: >>> >>>> Hi, >>>> >>>> I guess this may be more of a general linux question, so maybe it >>>> doesn't >>>> belong >>>> on the list, but here goes anyway: >>>> >>>> My webcam seems to be using 0.20A (total current is 0.33A for all the >>>> hardware), >>>> which is more than I'd like it to use. I only use it to take a picture >>>> once >>>> every day, so it seems a shame to use so much current for nothing. >>>> >>>> Is there a way I can turn it off completely (shutting down the capture >>>> program >>>> doesn't seem to be enough) by shutting down the usb port, and then >>>> starting it >>>> up again when I need it? >>>> >>>> Best regards, >>>> Lars >>>> >>>> ------------------------------------------------- >>>> >>>> >>>> ------------------------------------------------------------------------- >>>> This SF.net email is sponsored by: Splunk Inc. >>>> Still grepping through log files to find problems? Stop. >>>> Now Search log events and configuration files using AJAX and a >>>> browser. >>>> Download your FREE copy of Splunk now >> http://get.splunk.com/ >>>> _______________________________________________ >>>> gumstix-users mailing list >>>> gum...@li... >>>> https://lists.sourceforge.net/lists/listinfo/gumstix-users >>>> >>>> >>> >>> -- >>> Christopher Gilbert >>> B.S., Computer Science >>> University of Maine 2006 >>> http://motomastyle.com >>> ------------------------------------------------------------------------- >>> This SF.net email is sponsored by: Splunk Inc. >>> Still grepping through log files to find problems? Stop. >>> Now Search log events and configuration files using AJAX and a browser. >>> Download your FREE copy of Splunk now >> >>> http://get.splunk.com/_______________________________________________ >>> gumstix-users mailing list >>> gum...@li... >>> https://lists.sourceforge.net/lists/listinfo/gumstix-users >>> >>> >> >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by: Splunk Inc. >> Still grepping through log files to find problems? Stop. >> Now Search log events and configuration files using AJAX and a browser. >> Download your FREE copy of Splunk now >> http://get.splunk.com/ >> _______________________________________________ >> gumstix-users mailing list >> gum...@li... >> https://lists.sourceforge.net/lists/listinfo/gumstix-users >> >> > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> > http://get.splunk.com/_______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Lars R. <la...@ro...> - 2007-08-30 19:32:15
|
Thanks Deregistering the drivers doesn't seem to work. Hmm... annoying, as I built everything into a pretty blue box. If anybody has a software hint, for example some power-saving mode that'd help, that'd be so cool. I guess the project will be more complex (and fun) than initially planned. Lars Quoting 48...@la...: > I hope someone has a software solution for this... > > I have been planning to go with a relay for the power and a solid state > switch for the signal. > > I already have on hand: > > latching relays (Digikey PN 255-1776-5-ND) > relay drivers (Digikey PN MDC3105LT1GOSCT-ND) > solid state switches (Digikey PN NLAS2066USOSCT-ND) > > These will be driven by GPIO. > > Hope this helps.... > > James > > > Is your webcam the only USB client you have attached to your board? > > > > You may try removing the usbcore and other usb and video related modules > > using modprobe -r, but I think it is quite unlikely that this would > > disable > > the USB port itself. > > > > You could install a switch for your webcam. Are you looking for a > software > > only solution? > > > > 2007/8/29, Lars Roland <la...@ro...>: > >> > >> Hi, > >> > >> I guess this may be more of a general linux question, so maybe it > >> doesn't > >> belong > >> on the list, but here goes anyway: > >> > >> My webcam seems to be using 0.20A (total current is 0.33A for all the > >> hardware), > >> which is more than I'd like it to use. I only use it to take a picture > >> once > >> every day, so it seems a shame to use so much current for nothing. > >> > >> Is there a way I can turn it off completely (shutting down the capture > >> program > >> doesn't seem to be enough) by shutting down the usb port, and then > >> starting it > >> up again when I need it? > >> > >> Best regards, > >> Lars > >> > >> ------------------------------------------------- > >> > >> > >> > ------------------------------------------------------------------------- > >> This SF.net email is sponsored by: Splunk Inc. > >> Still grepping through log files to find problems? Stop. > >> Now Search log events and configuration files using AJAX and a browser. > >> Download your FREE copy of Splunk now >> http://get.splunk.com/ > >> _______________________________________________ > >> gumstix-users mailing list > >> gum...@li... > >> https://lists.sourceforge.net/lists/listinfo/gumstix-users > >> > > > > > > > > -- > > Christopher Gilbert > > B.S., Computer Science > > University of Maine 2006 > > http://motomastyle.com > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by: Splunk Inc. > > Still grepping through log files to find problems? Stop. > > Now Search log events and configuration files using AJAX and a browser. > > Download your FREE copy of Splunk now >> > > http://get.splunk.com/_______________________________________________ > > gumstix-users mailing list > > gum...@li... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > ------------------------------------------------- |
From: Craig H. <cr...@gu...> - 2007-08-30 19:35:25
|
On Aug 30, 2007, at 12:31 PM, Lars Roland wrote: > Thanks > > Deregistering the drivers doesn't seem to work. > > Hmm... annoying, as I built everything into a pretty blue box. If > anybody has a > software hint, for example some power-saving mode that'd help, > that'd be so cool. > > I guess the project will be more complex (and fun) than initially > planned. The problem is that the +5V on the USB will always be supplied, so the camera will always be sucking power (unless it powers its own self down). You'd need to gate the power supply on that line in order to shut it down. C |