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Usb charge

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By WarlockM, Junior Member on 20th November 2010, 08:45 AM
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25th February 2012, 10:28 PM |#81  
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After following some of the above and prior advice on modifying the USB to make my Galaxy Tab Plus 7.0 charge properly, I decided to start with a USB car charger. The one in particular is specified as a 3amp device total over 2 USB ports, so if it is anything close to spec in reality, it aught to provide enough power to charge my tablet. Next, other than the resistors, failing to find any cheap parts or cables to modify at the local radio shack, I decided to try it one step better. I decided to try opening up the car charger itself and just soldering the resistors at the source. After opening, I found adequate space to do the work and simply I chose the easiest accessible port to do my soldering work. If you have any questions on pinouts and identifying which resistor goes where, you can reference the earlier posts and other sites for clarification. I also used the 33K resistor on the +5(red) and the 10K resistor on the ground(black) pins, with them center tapped on both connected data lines. The charger in particular was from Best Buy and is named RocketFish. Seems to be working so far!!
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14th March 2012, 02:45 PM |#82  
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I had the same problem with my tablet, a LePan II, and someone directed me to this thread. These posts helped me make my adapter cable - thanks!

In my case, no resistors are needed, but I found out that the car adapter I am using (i-xt at Walmart for $12) does put out 1.95 V on one data line and 2.56V on the other. So it may work for your Galaxy Tab with no modifications. You may want to check it out.
8th April 2012, 07:32 PM |#83  
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Hi I managed to solder the usb extension cable with the resistors as described.
It works like charm with apple usb charger.
Please take a look on the attached pictures.
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9th April 2012, 04:53 AM |#84  
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Quick Question, not sure if this has been asked before, but as long as we are on the issue of charging cable, I realized that I could charge my tab using my mac...that was not possible before I've installed ICS...am I the only one? Or all these charging "issue" can be fixed by software?
9th April 2012, 02:24 PM |#85  
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It can not take more than 0.5A from a mac. In such case original ROM will display red cross over the battery icon. In both cases the charging is not optimal because it requires 2A for good charging.

Quote:
Originally Posted by gildow

Quick Question, not sure if this has been asked before, but as long as we are on the issue of charging cable, I realized that I could charge my tab using my mac...that was not possible before I've installed ICS...am I the only one? Or all these charging "issue" can be fixed by software?

9th April 2012, 10:51 PM |#86  
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Thanks for clearing that up.


Sent from my GT-I9000 using XDA
26th April 2012, 08:50 PM |#87  
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There is acualy one USB-port on some Macbooks that is wired to become an Superduperextrastrong chargingport when an iPad is connected. Ofcourse there is an correct name for it, but you get the point.

There is also an softwarefix for this issue, but that is sorted by rooting and installing a custom kernel that gives the user the option to force the Charge with full power feature the above mentioned adaptor does the "hard" way.

B.t.w. in progres off uppgrading an original cable by soldering the resistors direktly into the 30-pin connector. Its quite roomie in there. Pics will be posted.
25th May 2012, 07:53 AM |#89  
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The same for 2.7$ from dealextreme:
http://www.dealextreme.com/p/usb-dat...-91141?item=14

I want to buy it.

-----------
Can't wait a month =)
Just bought parts and soldered my own fix for my TAB

costs:
resistors 2 RUB per each (about 0,07$)
one USB part costs 15 RUB (about 0,5$)
another USB part costs 8 RUB (about 0,25$)

It's WORKING !!!! =)

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28th May 2012, 01:43 PM |#90  
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I've a bit modified my first version and now it looks like this:

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and release:

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29th May 2012, 01:35 AM |#91  
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Googled for this same issue, and came across this thread. Thanks!
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