Sounds like someone we really really need to help out with the power problems we have been havingf throughout SA.... These problems already originated in España so I wouldn't be surprised if there is a link...
who knows, maybe we can fix it in a couple of days.... optimism ALWAYS amigo! kindr regards, David 'nubae' Van Assche On Thu, Mar 31, 2011 at 9:43 PM, Ismael Schinca <ischi...@plan.ceibal.edu.uy> wrote: > Richard, Ceibal about to start working heavily in reworking how to classify > used batteries. Due to the number of batteries involved, we were asked to > devise a "good enough" procedure to estimate the battery condition in less > than 10 minutes. The plan would be to get several parameters from the > batteries and try to estimate it's condition based on them. Have you been > able to analyze the results from the logs I sent you? > Another question. Is there information in the battery controller regarding > total number of charge/discharge cycles? > Thanks! > Ismael > > 2011/3/30 Ismael Schinca <ischi...@plan.ceibal.edu.uy> >> >> Ok. Better late than never. >> Attached here are the logs from the XO batteries. >> Each file has one .csv log with the battery serial at the end of the file >> name given by the olpc-pwr-log. >> The tests were all run simultaneously even though some timestamps are off. >> There are two logs for each battery. The first one chronologically is the >> one corresponding to the battery discharging and the second one is for the >> charging process. >> There were two XO with a brand NEW battery, with a label NEW at the end of >> the file names and two tests run with really OLD and badly shaped batteries, >> labeled OLD. The rest are from old but "good enough" batteries. >> Caveat: the charging tests were done with the xset -dpms not set due to >> some miscalculation, so the screen went off some times. Sorry about that. >> The discharging process went as planned. >> I haven't had time yet to analyze the logs, so I don't have comments >> regarding the results. >> Cheers! >> 2011/3/24 Paul Fox <p...@laptop.org> >>> >>> ismael wrote: >>> > OK. Great. Is the attached version newer than the one in Sugar 0.88?? >>> >>> almost certainly. >>> >>> paul >>> >>> >>> > Because the latest dextrose image is mainly based on Sugar 0.88 >>> > >>> > 2011/3/24 Richard A. Smith <rich...@laptop.org> >>> > >>> > > On 03/24/2011 10:41 AM, Ismael Schinca wrote: >>> > > >>> > > I'm planning to use different XO's, all of them 1.0 hardware. I >>> > >> definately won't be able to finish today because they all have >>> different >>> > >> OS images and I think it would be best if I update them all (even >>> for >>> > >> future tests). Maybe tomorrow, maybe monday. >>> > >> >>> > > >>> > > Yes certainly please use the same image on all of them. If you have >>> to >>> > > install software then please use the latest version of olpc-pwr-log. >>> I have >>> > > it attached to this mail. >>> > > >>> > > >>> > > I think it will be very hard to perform the same test under the >>> same >>> > >> conditions as you suggest because: >>> > >> - It will be very time consuming (though it doesn't need a lot of >>> > >> attention during the test) >>> > >> >>> > > >>> > > My goal is to automate the test and use a very short test window. >>> ie 20 >>> > > minutes or so. >>> > > >>> > > >>> > > - The air conditioning in our building is quite frankly chaotic so >>> > >> temperature is really variable (which is actually a lot worse for >>> us >>> > >> humans than batteries ;) ) >>> > >> >>> > > >>> > > Yes. Sorry my use of the word exactly was probably too strong. I >>> don't >>> > > mean that it has to be 25 degC ambient and only that temperature. >>> The temp >>> > > fluctuations in a air conditioned office should be within reason. I >>> just >>> > > don't want the profiles generated in an office and then the test run >>> in a >>> > > outside warehouse at 33C. Or the curves generated on a XO-1 with >>> build 8.2 >>> > > but the test run on a 1.5 with build 10.1.3. That sort of thing. >>> > > >>> > > The closer I might get, which I think could be pretty close is: >>> > >> - Install the SAME fresh OS image and firmware version on all the >>> test XOs >>> > >> - Disable power management in every XO. >>> > >> >>> > > >>> > > and dpms. xset -dpms from the sugar terminal other wise the screen >>> will >>> > > turn off in 20 minutes and change the power draw. >>> > > >>> > > >>> > > - The laptops batteries are mostly charged, so it will be a charge >>> after >>> > >> discharge, so I think temperature there is less of a concern >>> > >> - Run the tests at the same time in every XO >>> > >> >>> > > >>> > > Yes. I believe that will work fine. >>> > > >>> > > Note: I'm getting on a plane in a few minutes so this will be my >>> last >>> > > e-mail until much later on today. Possible tonight or tomorrow. >>> > > >>> > > >>> > > -- >>> > > Richard A. Smith <rich...@laptop.org> >>> > > One Laptop per Child >>> > > >>> > >>> > >>> > >>> > -- >>> > Ismael Schinca >>> > Centro Ceibal - Depto. Técnico - I+D >>> > Avda. Italia 6201 - Edificio Los Ceibos >>> > Montevideo - Uruguay. >>> > Tel.: 2601 57 73 Int. 2232 >>> > part 2 text/plain 129 >>> > _______________________________________________ >>> > Devel mailing list >>> > Devel@lists.laptop.org >>> > http://lists.laptop.org/listinfo/devel >>> >>> =--------------------- >>> paul fox, p...@laptop.org >> >> >> >> -- >> Ismael Schinca >> Centro Ceibal - Depto. Técnico - I+D >> Avda. Italia 6201 - Edificio Los Ceibos >> Montevideo - Uruguay. >> Tel.: 2601 57 73 Int. 2232 >> > > > > -- > Ismael Schinca > Centro Ceibal - Depto. Técnico - I+D > Avda. Italia 6201 - Edificio Los Ceibos > Montevideo - Uruguay. > Tel.: 2601 57 73 Int. 2232 > > > _______________________________________________ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel > > _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel