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Re: [Gumstix-users] Expansion board power consumption
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From: Marc H. <mhu...@lo...> - 2008-02-01 13:50:02
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Since you don't plan on using the wifi you can simply unplug (physically detach it) the wifi and you can even order the netwifi-uSD with out the wifi module in future. -----Original Message----- From: gum...@li... [mailto:gum...@li...] On Behalf Of Jay Phillips Sent: Thursday, January 31, 2008 1:31 PM To: 'General mailing list for gumstix users.' Subject: Re: [Gumstix-users] Expansion board power consumption Thanks for those numbers. I'm already tracking sensor draws separately, so the 100mA sounds better than 250mA. Ouch, didn't realize WiFi was so hungry. At some point I'll look into the possibility of shutting off the wired connection to save power since I won't be using it. ----------------------------------------------------- Jay Phillips Tronix LLC - http://tronixllc.com -----Original Message----- From: gum...@li... [mailto:gum...@li...] On Behalf Of Dave Hylands Sent: Thursday, January 31, 2008 10:27 AM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Expansion board power consumption Hi Jay, On Jan 31, 2008 10:08 AM, Jay Phillips <jay...@tr...> wrote: > I know that "it depends". I was looking for some "order of magnitude" type > of info. > > I put 250mA in the spreadsheet as a placeholder for now. Same for the > netwifimicro-SD. According to the datasheet for the ATMega128, an idle 8 MHz processor draws 11 mA, and an active one draws 19 mA. They don't give numbers for 16 MHz. So 50-100mA feels like a good number (for the whole robostix board), plus whatever your sensors draw. 250 seems like a reasonable place to start for the netwifimicrosd without a wifi module. With a wifi module, you'll want 600 - 700 mA. > The big current draws are going to be the drive motors, with a locked-shaft > current of 5A. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users |