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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   Solution: N900 Charging from dumb power sources *UPDATED* (https://talk.maemo.org/showthread.php?t=38230)

twoboxen 2009-12-30 03:51
Re: Solution: N900 Charging from dumb power sources
 
Quote:
Originally Posted by jackburton (Post 446168)
For anybody who doesn't want to hack anything together, I have found another solution.
Are you sure that it isn't just luck of the draw? Meaning, maybe the amperage is within tolerance to work. I had one dumb usb charger work and another that never did.

Seems like grounding those pins might be the only full solution.

jackburton 2009-12-30 03:59
Re: Solution: N900 Charging from dumb power sources
 
I do not think this Motorola adapter is luck of the draw. Even the instruction diagram indicates its use for using a car charger with mini-usb for use with a micro-usb phone. Here is the usage sheet:
http://www.flickr.com/photos/brandersnaxe/4227505038/

Laughing Man 2009-12-30 04:01
Re: Solution: N900 Charging from dumb power sources
 
Quote:
Originally Posted by jackburton (Post 446168)
For anybody who doesn't want to hack anything together, I have found another solution. Get a Motorola SKN6252 mini-usb to micro-usb adapter. Then use a regular A to mini-b USB cable from the dumb charger. I have verified this to work. I got the adapter from Amazon http://www.amazon.com/Micro-Adapter-.../dp/B000IBLD3E. I am using this 'shorty' cable from Cyberguys.com: http://www.cyberguys.com/product-det...roductid=10030.

Here is an action shot:
http://www.flickr.com/photos/brandersnaxe/4227462726/
Wait so you have to get both? Since the Amazon one only goes from Micro to Mini USB.

jackburton 2009-12-30 04:08
Re: Solution: N900 Charging from dumb power sources
 
You need the motorola adapter and a decent mini-usb cable. I got the adapter for 99 cents on Amazon. I just tried it with an old PSP USB cable I have. Had to plug and unplug a few times, but it is charging now.

twoboxen 2009-12-30 04:08
Re: Solution: N900 Charging from dumb power sources
 
Quote:
Originally Posted by jackburton (Post 446174)
I do not think this Motorola adapter is luck of the draw. Even the instruction diagram indicates its use for using a car charger with mini-usb for use with a micro-usb phone. Here is the usage sheet:
http://www.flickr.com/photos/brandersnaxe/4227505038/
Interesting... though, i'm wondering if the motorola phones it's replacing would have the same issue with other "dumb" micro usb chargers.

Does that make sense?

optimaxxx 2009-12-30 04:15
Re: Solution: N900 Charging from dumb power sources
 
what would happen if i just ripped out the two pins?

jackburton 2009-12-30 04:29
Re: Solution: N900 Charging from dumb power sources
 
Okay here is a gotcha with this adapter. Make sure the adapter is plugged into the N900 FIRST.

THEN plug in the DC mini-usb cable. I couldn't get charging to start otherwise..

Le_Petit_Lapin 2009-12-30 04:32
Re: Solution: N900 Charging from dumb power sources
 
Last time i tried soldering something I burnt a hold clean through a graphics card. I think its probably best if I give this a miss.

jackburton 2009-12-30 04:34
Re: Solution: N900 Charging from dumb power sources
 
One more gotcha. Apply power only when the N900 is on the home screen, otherwise charging may not start. Don't ask me why. It seems to start every time when on the home screen.

ossipena 2009-12-30 05:24
Re: Solution: N900 Charging from dumb power sources
 
Quote:
Originally Posted by optimaxxx (Post 446181)
what would happen if i just ripped out the two pins?
nothing compared to unmodified ports. the pins must be shorted, theyre insulated by default and ripping those out would still keep the pins insulated.


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