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force usb charging

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By kazuni, Senior Member on 31st January 2012, 03:40 AM
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I would like to charge my SGT 7.7 with the normal USB cable it came with on my pc; however, due to its lower mA output (USB standard is 500mA). The standard adapter it came with has 2000mA (2A) output, hence it detects and charges. However, I do notice that the unit charges at 1A with my iPhone charger, perhaps just a bit slower.

Anything we can modify in the rom to enable force usb charging? there is such a way in SGT 10.1 but I can't find a method similar to it on my 7.7
31st January 2012, 04:08 AM |#2  
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it charges when the device is in a powered off state... but very slowly
31st January 2012, 05:18 AM |#3  
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Quote:
Originally Posted by onicrom

it charges when the device is in a powered off state... but very slowly

Yep, it does.

But I would like to keep my device on while charging...
31st January 2012, 07:00 AM |#4  
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it's very slow because device detect voltage in data line. check out adapter in ebay.
Sent from my GT-P6800 using xda premium
31st January 2012, 09:19 AM |#5  
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Quote:
Originally Posted by zoftdev

it's very slow because device detect voltage in data line. check out adapter in ebay.
Sent from my GT-P6800 using xda premium

Yeah understood.
I'm using the Galaxy Nexus USB charger and it works well (1A)
but the iPhone 4S charger does not (also 1A)
31st January 2012, 07:59 PM |#6  
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Quote:
Originally Posted by kazuni

Yep, it does.

But I would like to keep my device on while charging...

Mine still charges even with the red X on the battery icon. Albeit, very slowly, and only really when the screen is off. Not bad for just listening to music while I'm at work!
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1st February 2012, 09:55 AM |#7  
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Smile USB charge adapter
To charge your GT7.7 using a usb cable you need to have an adapter.

You can make an adapter from the below parts. See attached images of the end result.

user rick75204 explains it best below.

http://forum.xda-developers.com/show...=845844&page=2

USB Extension Cable
33k-Ohm Resistor (Shack Part No. 271-1129)
10k-Ohm Resistor (Shack Part No. 271-006)

Steps:

1. Cut USB Extension Cable in half, lets name the 2 halves, the half you will plug into the power suppy will be called "Cable A" and the half that you plug into the Galaxy Tab Data Cable will be called "Cable B"

2. On 'Cable A" strip outer plastic to expose all wires within, eliminate Green and White on this cable only as it will not be needed, leaving you with only the Red and the Black Cables

3. On "Cable B" strip outer plastic to expose all wires within, this should leave you exposing all 4 wires

4. On "Cable B" strip both the Green and White wires and join thes 2 wires with the 2 resistor ends (you should be using the resistor ends that have the red band with these wires), these can be joined by either soldering or just twisting together.

5. Strip Red wire from both cables and join together with the 33k-Ohm Resister (this will be the larger of the 2 resistors and should also be the end with the Gold Band) and as well join these together with solder or just twisting together.

6. Repeat the above process with the Black wires and 10K-Ohm Resistor.

7. No finally use Electrical Tape or Shrink Tubing to cover all your work.
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1st February 2012, 12:37 PM |#8  
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USB Charging
Hi Guys

I recently bought a "Samsung Charging Adapter" from power gorilla for use with their portable power packs.

It is a usb adapter which when used in line with the Samsung USB cable, charges my 7.7 while I am using it from a 500ma USB port on my MAC ....

Philip
1st February 2012, 12:51 PM |#9  
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This works great for $7, has a switch to go from data to charging

http://item.mobileweb.ebay.com/viewi...d=160709394617
5th February 2012, 07:41 PM |#10  
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Question
how do you force charge on Galaxy Tab 10.1??
5th February 2012, 08:23 PM |#11  
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Quote:
Originally Posted by razorwokid

how do you force charge on Galaxy Tab 10.1??

Wrong forum Look in 10.1 development forum, in the thread for pershoot's kernel. Or buy one of the cables mentioned above.
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