From: Jon F. <jo...@ya...> - 2007-07-18 21:27:09
|
Yeah, the power rating did seem quite low. I see on the gumstix site they list 250mA for full load, but is that the real world current draw, or just when it's going full whack communicating and calculating? Also I think that's just the motherboard on its own. Has anyone any experimental figures? Jon ----- Original Message ---- From: Ray Johnston <Ray.Johnston@Artifex.com> To: General mailing list for gumstix users. <gum...@li...> Sent: Wednesday, 18 July, 2007 5:46:19 PM Subject: Re: [Gumstix-users] Solar Power Jon, These solar charger products on that site both have internal Li-ion batteries, so you _should_ be able to run for some time from these IF the Li-ion battery is charged, but the solar panels are rated at 120ma (at 6V) for the Freeloader and 300ma for the larger Solio. If you plan on running for extended times, you need to make sure your gumstix current requirements don't exceed the power you can get from the solar panel. I tend to try to have 3x as much rated power from the solar panel as the device needs, since you rarely get the full power from the real sun. Thus, for a 500ma (6V) gumstix power requirement, I would use a 9 watt solar panel (i.e., able to provide up to 1.5A at 6V). Ray ------------------------------------------------------------------------ Jon Fitt wrote: > Has anyone looked into solar powered solutions for powering their Gumstix? > > How about either of these: > http://www.ogormans.co.uk/freeloader_solar_power.htm > <http://www.ogormans.co.uk/freeloader_solar_power.htm> > > Jon > > ------------------------------------------------------------------------ > Yahoo! Mail is the world's favourite email. Don't settle for less, > sign up for your free account today > <http://uk.rd.yahoo.com/evt=44106/*http://uk.docs.yahoo.com/mail/winter07.html>. > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > ------------------------------------------------------------------------ > > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users ___________________________________________________________ Yahoo! Answers - Got a question? Someone out there knows the answer. Try it now. http://uk.answers.yahoo.com/ |
From: Jon F. <jo...@ya...> - 2007-11-02 20:53:01
|
Sorry if I missed your follow-up, but did you have any luck with this?=0A= =0AJon=0A=0A----- Original Message ----=0AFrom: Brad Midgley <bmidgley@gmai= l.com>=0ATo: General mailing list for gumstix users. <gumstix-users@lists.s= ourceforge.net>=0ASent: Wednesday, 18 July, 2007 11:23:56 AM=0ASubject: Re:= [Gumstix-users] Solar Power=0A=0AJon=0A=0A> Has anyone looked into solar p= owered solutions for powering their=0A Gumstix?=0A=0Aone really attractive = thing about these cells with built-in battery is=0Athey solve the building-= a-battery-system problem.=0A=0AIf you're planning to have something that ca= n power the gumstix=0Asustainably during daylight, then you'll have to care= fully spec the=0Acurrent draw with what the cells provide.=0A=0AI just got = one of the "clearance" sc002 models direct from solarstyle=0Afor $20 (inclu= des no adapters, but you have to build a cable anyway).=0AIt might provide = slightly higher current than the two you were looking=0Aat but the battery = is only 750mAh. I haven't done the test to see if=0Athe cells can keep up w= ith the gumstix. I'll try it this week.=0A=0AThe sc002 has "5v" and "3.6v" = modes (the latter probably disables the=0Adc/dc converter and could have be= tter results).=0A=0ABrad=0A=0A---------------------------------------------= ----------------------------=0AThis SF.net email is sponsored by DB2 Expres= s=0ADownload DB2 Express C - the FREE version of DB2 express and take=0Acon= trol of your XML. No limits. Just data. Click to get it now.=0Ahttp://sourc= eforge.net/powerbar/db2/=0A_______________________________________________= =0Agumstix-users mailing list=0Ag...@li...=0Ahttps= ://lists.sourceforge.net/lists/listinfo/gumstix-users=0A=0A=0A=0A=0A=0A=0A = ___________________________________________________________=0AYahoo! A= nswers - Got a question? Someone out there knows the answer. Try it=0Anow.= =0Ahttp://uk.answers.yahoo.com/ |
From: Brad M. <bmi...@gm...> - 2007-11-05 17:06:37
|
Jon I was able to use the solar style in 3.6v mode. I didn't get a chance to test from full to empty with and without sunlight. I'm guessing it would go about 6 hours plus whatever boost the sunlight gives it, so I don't expect it to sustain overnight or anything. I'm only using a gumstix and audiostix. Are you using other daughterboards? Brad On 11/2/07, Jon Fitt <jo...@ya...> wrote: > > Sorry if I missed your follow-up, but did you have any luck with this? > > Jon > > ----- Original Message ---- > From: Brad Midgley <bmi...@gm...> > To: General mailing list for gumstix users. > <gum...@li...> > Sent: Wednesday, 18 July, 2007 11:23:56 AM > Subject: Re: [Gumstix-users] Solar Power > > Jon > > > Has anyone looked into solar powered solutions for powering their Gumstix? > > one really attractive thing about these cells with built-in battery is > they solve the building-a-battery-system problem. > > If you're planning to have something that can power the gumstix > sustainably during daylight, then you'll have to carefully spec the > current draw with what the cells provide. > > I just got one of the "clearance" sc002 models direct from solarstyle > for $20 (includes no adapters, but you have to build a cable anyway). > It might provide slightly higher current than the two you were looking > at but the battery is only 750mAh. I haven't done the test to see if > the cells can keep up with the gumstix. I'll try it this week. > > The sc002 has "5v" and "3.6v" modes (the latter probably disables the > dc/dc converter and could have better results). > > Brad > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > ________________________________ > For ideas on reducing your carbon footprint visit Yahoo! For Good this > month. > ------------------------------------------------------------------------- > 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 > > -- Brad |
From: Jon F. <jo...@ya...> - 2007-11-06 01:36:10
|
Brad,=0A=0AI haven't actually bought a gumstix yet. I'm just feeling out a = few ideas for projects. I quite fancy running one completely mobile with no= need to be tethered to a power socket.=0A=0AJon=0A=0A----- Original Messag= e ----=0AFrom: Brad Midgley <bmi...@gm...>=0ATo: General mailing list= for gumstix users. <gum...@li...>=0ASent: Monday, 5= November, 2007 11:06:40 AM=0ASubject: Re: [Gumstix-users] Solar Power=0A= =0AJon=0A=0AI was able to use the solar style in 3.6v mode. I didn't get a = chance=0Ato test from full to empty with and without sunlight. I'm guessing= it=0Awould go about 6 hours plus whatever boost the sunlight gives it, so = I=0Adon't expect it to sustain overnight or anything.=0A=0AI'm only using a= gumstix and audiostix. Are you using other=0A daughterboards?=0A=0ABrad=0A= =0AOn 11/2/07, Jon Fitt <jo...@ya...> wrote:=0A>=0A> Sorry if I misse= d your follow-up, but did you have any luck with=0A this?=0A>=0A> Jon=0A>= =0A> ----- Original Message ----=0A> From: Brad Midgley <bmi...@gm...= >=0A> To: General mailing list for gumstix users.=0A> <gumstix-users@lists.= sourceforge.net>=0A> Sent: Wednesday, 18 July, 2007 11:23:56 AM=0A> Subject= : Re: [Gumstix-users] Solar Power=0A>=0A> Jon=0A>=0A> > Has anyone looked i= nto solar powered solutions for powering their=0A Gumstix?=0A>=0A> one real= ly attractive thing about these cells with built-in battery=0A is=0A> they = solve the building-a-battery-system problem.=0A>=0A> If you're planning to = have something that can power the gumstix=0A> sustainably during daylight, = then you'll have to carefully spec the=0A> current draw with what the cells= provide.=0A>=0A> I just got one of the "clearance" sc002 models direct fro= m solarstyle=0A> for $20 (includes no adapters, but you have to build a cab= le anyway).=0A> It might provide slightly higher current than the two you w= ere=0A looking=0A> at but the battery is only 750mAh. I haven't done the te= st to see if=0A> the cells can keep up with the gumstix. I'll try it this w= eek.=0A>=0A> The sc002 has "5v" and "3.6v" modes (the latter probably disab= les the=0A> dc/dc converter and could have better results).=0A>=0A> Brad=0A= >=0A>=0A ------------------------------------------------------------------= -------=0A> This SF.net email is sponsored by DB2 Express=0A> Download DB2 = Express C - the FREE version of DB2 express and take=0A> control of your XM= L. No limits. Just data. Click to get it now.=0A> http://sourceforge.net/po= werbar/db2/=0A> _______________________________________________=0A> gumstix= -users mailing list=0A> gum...@li...=0A> https://lis= ts.sourceforge.net/lists/listinfo/gumstix-users=0A>=0A>=0A> ______________= __________________=0A> For ideas on reducing your carbon footprint visit Y= ahoo! For Good=0A this=0A> month.=0A>=0A ----------------------------------= ---------------------------------------=0A> This SF.net email is sponsored = by: Splunk Inc.=0A> Still grepping through log files to find problems? Sto= p.=0A> Now Search log events and configuration files using AJAX and a=0A br= owser.=0A> Download your FREE copy of Splunk now >> http://get.splunk.com/= =0A> _______________________________________________=0A> gumstix-users mail= ing list=0A> gum...@li...=0A> https://lists.sourcefo= rge.net/lists/listinfo/gumstix-users=0A>=0A>=0A=0A=0A-- =0ABrad=0A=0A------= -------------------------------------------------------------------=0AThis = SF.net email is sponsored by: Splunk Inc.=0AStill grepping through log file= s to find problems? Stop.=0ANow Search log events and configuration files = using AJAX and a browser.=0ADownload your FREE copy of Splunk now >> http:/= /get.splunk.com/=0A_______________________________________________=0Agumsti= x-users mailing list=0Ag...@li...=0Ahttps://lists.= sourceforge.net/lists/listinfo/gumstix-users=0A=0A=0A=0A=0A=0A=0A ____= _______________________________________________________=0AYahoo! Answers - = Got a question? Someone out there knows the answer. Try it=0Anow.=0Ahttp://= uk.answers.yahoo.com/ |
From: Brad M. <bmi...@gm...> - 2007-11-07 00:27:59
|
Jon With the current power management situation in the gumstix platform, you'll need to plug it in for a while once or twice through the day. Solar mostly makes sense for extended outdoor activities or for standalone apps (like a sensor on the top of a lamp post). A little computer that would charge whenever it's plugged into a usb host would be a good fit for some kinds of wearable applications... especially if the user has a reason to plug it in, like audio link or data transfer. Brad > I haven't actually bought a gumstix yet. I'm just feeling out a few ideas > for projects. I quite fancy running one completely mobile with no need to be > tethered to a power socket. -- Brad |
From: Nate L. <sol...@gm...> - 2007-07-18 21:52:05
|
With a NetStix, audiostix, and a Connex board, I was getting 800mA of current draw with light loading. The Connex itself is not bad, but I found that when using add-on boards the current draw goes through the roof. Cheers, Nate L. On 7/18/07, Jon Fitt <jo...@ya...> wrote: > > Yeah, the power rating did seem quite low. > I see on the gumstix site they list 250mA for full load, but is that the > real world current draw, or just when it's going full whack communicating > and calculating? Also I think that's just the motherboard on its own. Has > anyone any experimental figures? > > Jon > > > ----- Original Message ---- > From: Ray Johnston <Ray.Johnston@Artifex.com> > To: General mailing list for gumstix users. > <gum...@li...> > Sent: Wednesday, 18 July, 2007 5:46:19 PM > Subject: Re: [Gumstix-users] Solar Power > > Jon, > > These solar charger products on that site both have internal > Li-ion batteries, so you _should_ be able to run for some time > from these IF the Li-ion battery is charged, but the solar panels > are rated at 120ma (at 6V) for the Freeloader and 300ma for the > larger Solio. > > If you plan on running for extended times, you need to make sure > your gumstix current requirements don't exceed the power you > can get from the solar panel. > > I tend to try to have 3x as much rated power from the solar > panel as the device needs, since you rarely get the full power > from the real sun. Thus, for a 500ma (6V) gumstix power requirement, > I would use a 9 watt solar panel (i.e., able to provide up to > 1.5A at 6V). > > Ray > ------------------------------------------------------------------------ > > Jon Fitt wrote: > > Has anyone looked into solar powered solutions for powering their Gumstix? > > > > How about either of these: > > http://www.ogormans.co.uk/freeloader_solar_power.htm > > <http://www.ogormans.co.uk/freeloader_solar_power.htm> > > > > Jon > > > > > ------------------------------------------------------------------------ > > Yahoo! Mail is the world's favourite email. Don't settle for less, > > sign up for your free account today > > > <http://uk.rd.yahoo.com/evt=44106/*http://uk.docs.yahoo.com/mail/winter07.html>. > > > > > ------------------------------------------------------------------------ > > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by DB2 Express > > Download DB2 Express C - the FREE version of DB2 express and take > > control of your XML. No limits. Just data. Click to get it now. > > http://sourceforge.net/powerbar/db2/ > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > ________________________________ > Yahoo! Mail is the world's favourite email. Don't settle for less, sign up > for your free account today. > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > |