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| 06:40.02 | zGrr | moin :) |
| 06:48.40 | KotCzarny | oink |
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| 07:25.52 | zGrr | KotCzarny: hi |
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| 07:53.29 | kerio | freemangordon: are you awake? |
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| 12:21.44 | freemangordon_ | do someone know how to replace "--" in a file, by using the replace command? |
| 12:26.00 | L29Ah | zsh: command not found: replace |
| 12:26.05 | L29Ah | must be some useless stuff |
| 12:26.26 | kerio | yeah idk i'd just use sed |
| 12:26.27 | L29Ah | sed -e 's#--#foobar#g' file |
| 12:26.37 | kerio | -bash: replace: command not found |
| 12:26.50 | freemangordon_ | I guess sed will take a while to pars 18GB file |
| 12:26.54 | freemangordon_ | *parse |
| 12:27.45 | freemangordon_ | it is part of mysql-server |
| 12:28.50 | bencoh | looks like the important property is "in-place" |
| 12:29.11 | freemangordon_ | well, sed can do it as well |
| 12:29.14 | freemangordon_ | -i |
| 12:29.30 | kerio | -i is quite nonstandard |
| 12:29.44 | freemangordon_ | don;t care, as ling as it works on ubuntu |
| 12:29.47 | freemangordon_ | r*long |
| 12:30.25 | freemangordon_ | anyway, could someone gimme the regexp to replace "--" with "#" at the start of line? |
| 12:30.37 | bencoh | freemangordon_: ^-- ? |
| 12:30.43 | freemangordon_ | no idea |
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| 12:30.53 | bencoh | ^ should be "start of line" |
| 12:30.58 | bencoh | so ^-- should work |
| 12:31.00 | freemangordon_ | I tend to not touch regexps |
| 12:31.03 | freemangordon_ | hmm, ok |
| 12:31.09 | KotCzarny | for inline you should probably use "# " or "##" |
| 12:31.20 | freemangordon_ | use where? |
| 12:31.29 | KotCzarny | in the replace |
| 12:33.04 | KotCzarny | sed -re 's/^\-\-/# /m' |
| 12:33.04 | KotCzarny | i think |
| 12:33.04 | KotCzarny | but check on a test file first |
| 12:33.04 | freemangordon_ | no, it turned out to be "\-\-", but I gave up on replace, as it doesnt seem to support regexp |
| 12:33.04 | freemangordon_ | ok |
| 12:33.04 | freemangordon_ | what is /m ? |
| 12:33.05 | KotCzarny | might be /s |
| 12:33.16 | KotCzarny | always confused about those two flags |
| 12:33.36 | bencoh | time to open the grymoire |
| 12:33.44 | bencoh | http://www.grymoire.com/Unix/Sed.html |
| 12:33.44 | KotCzarny | but just test it |
| 12:33.46 | KotCzarny | one of it works |
| 12:33.58 | KotCzarny | could be also without any flags |
| 12:34.47 | freemangordon_ | sed -i 's/^\-\-/#/' $FILE should do the job, lets see |
| 12:34.59 | KotCzarny | nope |
| 12:35.04 | KotCzarny | for ^ you need -r |
| 12:35.19 | KotCzarny | or im just sleepy |
| 12:35.30 | bencoh | I think you're sleepy |
| 12:35.54 | KotCzarny | i guess ^ isnt regexp anyway |
| 12:36.03 | bencoh | what is it then ? |
| 12:36.04 | freemangordon_ | "use extended regular expressions in the script." ??? |
| 12:36.05 | KotCzarny | and its not needed |
| 12:36.21 | KotCzarny | echo -e "123\n--234\n5--5" | sed -e 's/^--/# /' |
| 12:36.31 | KotCzarny | this one worked fine |
| 12:36.31 | freemangordon_ | KotCzarny: it works without -r here |
| 12:36.51 | KotCzarny | i guess sed just understands ^ without regexps flag |
| 12:36.57 | freemangordon_ | and why the '-e'? |
| 12:37.06 | KotCzarny | 'execute this script' |
| 12:37.14 | bencoh | KotCzarny: regex != extended regex |
| 12:37.15 | freemangordon_ | which script?!? |
| 12:37.22 | KotCzarny | the one in '' |
| 12:37.35 | freemangordon_ | but, but... it does it wothout -e |
| 12:37.39 | KotCzarny | though it worked without -e too |
| 12:37.46 | KotCzarny | might be for multiple scripts |
| 12:37.48 | bencoh | freemangordon_: -e allows for multiple expressions |
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| 12:37.59 | freemangordon_ | so I don;t need it I guess |
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| 13:46.00 | Cat_bus | Hey there, I am entirely new to maemo. What kind of OS things can I actually run on a N900? |
| 13:46.23 | L29Ah | any linux of your choice, basically |
| 13:47.10 | Cat_bus | are there readymade images anywhere or do I have to chase the parts? any overview thread? |
| 13:47.29 | L29Ah | google n900 <yourdistro> |
| 13:47.34 | bencoh | there are quite a few articles/threads about running other distros |
| 13:48.14 | bencoh | keep in mind you might/will lose some functionalities |
| 13:48.44 | Cat_bus | ok, thats what I was about. Whats the best thing, to still use it as phone? |
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| 13:49.13 | bencoh | most probably maemo |
| 13:49.54 | KotCzarny | he he |
| 13:50.06 | bencoh | even though you should be able to keep the phone part with any distro, a custom kernel, and proper userland (ofono for instance, or some libcmt-speech based software) |
| 13:50.08 | KotCzarny | in short, old glibc and old kernel |
| 13:50.17 | KotCzarny | other than that everything linuxish works |
| 13:51.26 | KotCzarny | it has 256M of ram, so dont expect anything modern to work |
| 13:54.46 | Cat_bus | So I will chase parts ^^ thanks! |
| 13:55.14 | bencoh | chase parts ? |
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| 18:22.22 | freemangordon | ShadowJK: I have an external battery (solar) which I didn;t use for long time. now, it seems it self-discharged too much. I disassembled it and the voltage on battery ports was .36V. I connected a charger and after about 1h, the voltage is 0.43V. So, 1 - is it safe to charge that battery? 2-what consequences should I expect? |
| 18:23.12 | ShadowJK | It might catch fire eventually |
| 18:28.58 | KotCzarny | freemangordon: it started crystallizing inside |
| 18:29.02 | KotCzarny | battery is ded |
| 18:29.10 | KotCzarny | ded ded |
| 18:29.11 | freemangordon | ShadowJK: really? even if the charging current is just a couple of mA |
| 18:29.37 | KotCzarny | and crystals pierce the insulator |
| 18:29.43 | freemangordon | hmm, I see |
| 18:30.41 | KotCzarny | and you know what happens when high current runs inside? |
| 18:30.46 | KotCzarny | or outside |
| 18:31.42 | KotCzarny | part of it might still holding charge, but overall its trash now |
| 18:31.44 | ShadowJK | http://www.mpoweruk.com/lithium_failures.htm |
| 18:32.42 | ShadowJK | So the copper in it is dissolving, if you manage to recharge it, and the copper is now no longer dissolved, you'll have solid copper in random places where it's not supposed to be.. which makes the battery riskier to use, because that copper creates local short ciruits |
| 18:34.10 | freemangordon | ok, got it, thanks |
| 18:34.32 | freemangordon | the battery goes to trash, might use the solar cell though :) |
| 18:35.45 | KotCzarny | definitely |
| 18:36.22 | KotCzarny | all lions charge the same (roughly) so you should be able to replace it |
| 18:36.29 | freemangordon | yeah |
| 18:37.54 | freemangordon | hmm, is it safe to connect li-ion batteries in parallel? |
| 18:38.37 | freemangordon | my gut feeling tells me yes, but I want some expert's say :) |
| 18:38.49 | ShadowJK | If they're at the same voltage when you make the connection |
| 18:38.50 | KotCzarny | i dont know, but i bet its not safe |
| 18:38.59 | freemangordon | ShadowJK: yea, sure |
| 18:39.05 | KotCzarny | different parameters/aging |
| 18:39.13 | KotCzarny | so they will charge/discharge differently |
| 18:39.19 | ShadowJK | Li-Ion batteries in parallell are self-balancing |
| 18:39.26 | ShadowJK | NiMh batteries in parallell are not |
| 18:39.36 | KotCzarny | nice to know |
| 18:39.49 | freemangordon | ShadowJK: thanks a lot |
| 18:40.10 | KotCzarny | shadowjk: how to make them same voltage tho? |
| 18:40.21 | freemangordon | charge them ;) |
| 18:40.24 | ShadowJK | yep |
| 18:40.24 | KotCzarny | or some mergin of difference is acceptable? |
| 18:40.59 | KotCzarny | doh |
| 18:41.03 | KotCzarny | s/mergin/margin/ |
| 18:41.06 | freemangordon | I guess no, the charging current will be too big |
| 18:41.23 | ShadowJK | You can crudely estimate the margin of difference, by multiplying cell voltage difference by the sum of the internal resistances of the two cell. Hobbyists don't always have access to equipment that can measure the internal resistance, though :) |
| 18:41.44 | KotCzarny | so, its not safe at home |
| 18:41.45 | KotCzarny | :) |
| 18:42.10 | freemangordon | KotCzarny: I guess a serial resistor for a couple oh hours will make it safe :) |
| 18:42.15 | freemangordon | *of |
| 18:43.13 | KotCzarny | wouldnt that confuse the charger tho? |
| 18:43.39 | freemangordon | you're missing the point - connect those 2 charged batteris in paralle, but through a resistor |
| 18:43.42 | ShadowJK | So for example two fresh new BL-5J batteries have an internal resistance of, well, for this puprose well use a bit too low estimate of 0.1 Ohm. Say one was in a N900 that just shut down, so around 3.5V, and the other is full at 4.2V. Ohm's law, (4.2V - 3.5V) / 0.2 .. 4.5 Amps... Which is a bit too much :) |
| 18:44.30 | freemangordon | until the measured voltage (and thus the charging current from higher voltage batt to lower) falls in some safe margin |
| 18:45.11 | ShadowJK | So I'd say this puts the safe margin at < 0.1V difference :) |
| 18:45.18 | KotCzarny | hehe |
| 18:46.20 | KotCzarny | also, what would happen if one of the batteries gets bad? (for whatever reason) |
| 18:46.20 | freemangordon | for example 10 Ohm resistor for 24 hours (sounds good to me, didn;t calculated) will be enough IMO |
| 18:46.36 | freemangordon | KotCzarny: fire in the hole I guess |
| 18:46.38 | freemangordon | :) |
| 18:46.41 | KotCzarny | :) |
| 18:46.51 | KotCzarny | sounds fun |
| 18:47.05 | freemangordon | ShadowJK: what about that serial R? does ity sound sane to you? |
| 18:47.14 | freemangordon | assuming both batteries are charged to 4.2 |
| 18:47.46 | freemangordon | ~.1/10 |
| 18:47.46 | infobot | 0.01 |
| 18:48.01 | freemangordon | 10 mA should be safe by all measures |
| 18:48.06 | ShadowJK | Personally, if I charged them both in a non shitty charger i would just parallell with wire |
| 18:48.23 | freemangordon | yeah, but you never now |
| 18:48.45 | freemangordon | I mean - the charger quality, unless you have a lab |
| 18:48.53 | freemangordon | which I don't :) |
| 18:49.35 | ShadowJK | Coincidentally I do have a battery jumper wire with a 1R resistor in it, but that I used for inrush current limiting |
| 18:50.15 | freemangordon | so 10R is t0o much? |
| 18:50.18 | freemangordon | *too |
| 18:50.24 | ShadowJK | when i was lacking 24V psu and wanted to power some 24V inudstrial kit |
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| 18:50.58 | ShadowJK | eh, dunno |
| 18:51.06 | freemangordon | :) |
| 18:51.35 | freemangordon | ok, will see when I don;t find a replacement battery so I need to use 2 or 3 smaller ones |
| 18:51.40 | ShadowJK | id just check battery voltaged with meter, and if close use wire, if not, resistor |
| 18:52.31 | freemangordon | ok |
| 18:54.00 | ShadowJK | just bought a 6000mAh powerbank from Lidl for 12E :) |
| 18:55.14 | ShadowJK | Did you btw see about that new Mediatek SoC? |
| 18:55.20 | ShadowJK | 10(+1) cpu cores |
| 18:55.31 | ShadowJK | kinda insane :) |
| 18:59.20 | freemangordon | omg |
| 19:00.47 | kerio | rip freemangordon |
| 19:00.49 | kerio | you will be missed |
| 19:01.59 | freemangordon | hmm? |
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| 19:02.23 | kerio | such a young life |
| 19:02.31 | kerio | lost in the explosion of multiple lithium batteries |
| 19:02.40 | kerio | connected in parallel |
| 19:02.47 | kerio | *charged in parallel |
| 19:03.00 | freemangordon | :D |
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| 19:16.46 | KotCzarny | charge junkie |
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