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2010-04-17
, 22:20
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Posts: 51 |
Thanked: 10 times |
Joined on Feb 2010
@ Helsinki, Finland
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#12
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Originally Posted by shadowjk
That would be the DC-10, a rather chunky thing. BTW, why does Nokia no longer have any technical info on products like this on their website?
Nokia has two different MicroUSB car chargers. The stronger one delivers 1200mA.
Originally Posted by shadowjk
Of course Nokia says nothing about the currents, though they do claim this combination works.
Fter ca-146c, dc-4 is probably down to 500mA
By the way, I tried to get a word to a friend-of-a-friend at the Nokia development department, asking that logging about this kind of events (for example, the dialogue between devices over the MicroUSB port) be made available to the user, so that cases where it doesn't work won't stay "this just doesn't work" type mysteries. For example, it turns out quite a lot of the "no name" brand USB charger devices return more or less random device types to the N900, which often will refuse to talk to them because of this.
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2010-04-17
, 22:38
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Posts: 3,159 |
Thanked: 2,023 times |
Joined on Feb 2008
@ Finland
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#13
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Originally Posted by RockCreek1
V + mA
If you get a chance and can look up and post online the exact names/models of the chargers you have that do work, that would be much appreciated. Thank you.
thats all you need, not spesific models etc....
e: I have 4 CA-146C -adapters, all work perfectly unless using those with 3V 300mA chargers that almost can charge nokia 1100 in 5 hours....
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Last edited by ossipena; 2010-04-17 at 22:42.
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2010-04-18
, 09:59
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Posts: 1,258 |
Thanked: 672 times |
Joined on Mar 2009
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#14
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Originally Posted by extechop
Yeah it's very annoying. You'd think they no longer want to sell stuff.
That would be the DC-10, a rather chunky thing. BTW, why does Nokia no longer have any technical info on products like this on their website?
By the way, I tried to get a word to a friend-of-a-friend at the Nokia development department, asking that logging about this kind of events (for example, the dialogue between devices over the MicroUSB port) be made available to the user, so that cases where it doesn't work won't stay "this just doesn't work" type mysteries. For example, it turns out quite a lot of the "no name" brand USB charger devices return more or less random device types to the N900, which often will refuse to talk to them because of this.
/sys/class/i2c-adapter/i2c-1/1-0048/twl4030_usb/
contains some nodes. 'vbus' is probably 1 when there is voltage on the microusb port. linkstat seems to change whenever something is connected. I am guessing microamps_requested* either shows how much power n900 was given permission to draw, or how much it asked for..
/sys/devices/platform/musb_hdrc/
has the node 'charger', which is 1 whenever a charger that identifies itself with shorted d+/d- is connected. vbus is probably same as before. Other intersting nodes like 'mA' and 'connect'.
What's missing is sysnodes for the actual charger. I get the impression bme is very lazy about checking the charger status, not noticing if the charger aborted because of too crap power available on the musb port. It will also, of course, happily claim charging when charging from an otherwise healthy powersource that's unable to charge faster than n900 uses power.
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2010-08-22
, 19:24
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Posts: 51 |
Thanked: 10 times |
Joined on Feb 2010
@ Helsinki, Finland
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#15
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Originally Posted by extechop
This is a combination that seems to work, albeit not very quickly, and the CA-146C does get hot.
I now have a Nokia round plug charger DC-4, which is also supposed to deliver 890 mA, let's see how well that works in the car with the CA-146C and the N900.
I've ordered this Car Cigarette Powered 1000mA USB Adapter/Charger (there is also a white version). "evilalex" dissected it and did measurements, coming to the conclusion it does do what was promised. It just seems to be sold out at the moment, they should have more in a few days.
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2010-08-22
, 19:36
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Posts: 1,258 |
Thanked: 672 times |
Joined on Mar 2009
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#16
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I doubt CA-146C can pass through 1000mA...
I don't mean that it wont work, just that you'll see something like 300-500mA after it
I don't mean that it wont work, just that you'll see something like 300-500mA after it
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2010-08-22
, 19:49
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Posts: 3,159 |
Thanked: 2,023 times |
Joined on Feb 2008
@ Finland
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#17
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Originally Posted by zlatko
Here is the point. So hop hop and check out what your charger outputs. I realized what was going on after I once tried to charge N900 with 1100's charger(AC-3E) which just isn't enough to any modern smartphone and CA-146C.
I normally charge my N900 overnight using older Nokia charger ACP-12E(800mA output) via CA-146 adapter. Charging takes ~ 2.5 hours. I tried to use AC-3E(350mA) with the idea that charging will take longer and thus the battery will start draining later so I will get few more hours autonomy, but with that charger charging almost never ends.
__________________
Want to know something?
K.I.S.S. approach:
wiki category:beginners. Browse it through and you'll be much wiser!
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Want to know something?
K.I.S.S. approach:
wiki category:beginners. Browse it through and you'll be much wiser!
If the link doesn't help, just use
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2010-08-22
, 19:52
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Posts: 51 |
Thanked: 10 times |
Joined on Feb 2010
@ Helsinki, Finland
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#18
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Originally Posted by shadowjk
Indubitably, but the 1000 mA adapter I linked to above has an USB socket – I no longer would need the CA-146C
I doubt CA-146C can pass through 1000mA...
I don't mean that it wont work, just that you'll see something like 300-500mA after it
Fter ca-146c, dc-4 is probably down to 500mA