Attend XDA's Second Annual Developer Conference, XDA:DevCon 2014!
5,736,660 Members 54,225 Now Online
XDA Developers Android and Mobile Development Forum

[GUIDE][DIY] Charge-while-syncing cable ("Benchmark" added)

Tip us?
 
Goatshocker
Old
(Last edited by Goatshocker; 16th April 2012 at 09:28 AM.)
#1  
Goatshocker's Avatar
Senior Member - OP
Thanks Meter 407
Posts: 941
Join Date: Oct 2010
Default [GUIDE][DIY] Charge-while-syncing cable ("Benchmark" added)

This guide is based on [GUIDE] The $6 way to charging your EEE Pad on your computer, taken one step further.


DISCLAIMER! YOU DO THIS ON YOUR OWN RISK! IF YOU SCREW SOMETHING UP ITS NOT MY FAULT!


This guide will show you how you can charge your TF101 from the PC, while also have it connected through USB allowing you to sync etc just as you normally would.
Its possible this method also works on the TF201, but I dont know for sure.

Difficulty: Pisseasy
Parts and tools needed:
A female molex connector with the yellow(+12v) and black(ground) wire. Where you get it from doesnt matter. I stole mine from an old pci-e -> molex adapter.
Headphone extension cord (or any other 2-wire cable you can use as a connector)
USB extension cord (2.0 works fine, no need to get a 3.0)
Tape (or if youre not as lazy as me - a soldering iron)
Teeth (or a wire-stripper/cutter)
Carpet knife or similar
Multimeter, not necessary but recommended to check if the power is correct before hooking it up to your tablet.

Ok, lets get started!
Id like to apologize for the rather vague images. I took them after I had actually built the cable.


Grab the male end of the headphone extension cord and cut it, leaving a bit of cable (I left around 20cm)



Next, grab the USB Extension cord.
I wish I had a better picture for this, but its not that tricky. What you want to do is remove the cover around the shielding, remove the shielding and exposing the 4 wires.
Once thats done, cut the red and black wires, leave the green and white.
Strip the red and black wires going towards the female end of the extension cord.
Connect the white and red wire from the male audio extension cord to the red and black wire on the usb extension cord. I suggest you attach red to red, white to black. It doesnt matter much though, but do remember how you connect them.
If done correctly you should end up with something similar as the picture.



Grab your favorite roll of tape and secure the wires and you should end up with this



Gratz, the first part is complete! Now to steal some power from the PC.

Grab the remaining part of the audio extension cord, which should contain the female connection.


Grab your molex connector (In the picture, I have already stolen one of the molex connectors)



Now, strip the yellow and black wire on the molex connector, and strip the red and white cable on the female audio cord.
Connect them the same way you did with the usb cable (if you followed my example, yellow goes to red, black goes to white).

Excuse my extremely dusty PC... Im ashamed :x

this might be a good part to route the molex-female audio cable inside the PC so it reaches outside.

Once thats done, simply hook the molex connector up to a free connector in your PC



And finally, grab your usb-male audio cable, connect the male audio with the female audio and plug the usb end into a free usb port.




Finally! Hook up your original TF101 usb cable to the female end of the USB cord and enjoy being able to charge your tablet while transfering files!

WARNING! Do NOT connect anything but the TF to this cable. 12v will fry any normal USB device.


Troubleshooting:
If your tablet does not react when you connect it, you have most likely gotten the polarities wrong. Simply switch the place of either red/black on the usb cable, or yellow/black on the molex connector (this is where a multimeter is handy).

There are many ways of doing this, I chose to do it like this because I had an audio extension cord lying around, and I wanted to be able to detach the cable from the PC.
Basically all you have to do is cut the red and black wire from the usb cable, and hook them up to the 12v rail on your PC instead of the 5v rail USB is running on.

How you chose to do this is, in the end, up to you.

Additionally, if you replace the audio jacks with some other more standard DC plug, you could use this cable to charge your TF using any DC adapter that provides 12-15V.


Once I get a USB Extension Kit for my TF, Im going to try to add a charging port to that as well. If I succeed in that, Ill post another guide covering that.


If you found this guide useful, hit 'thanks'
Quick ADB Pusher v0.5 (discontinued)
--------------------------------------------------------------------
Phone(ancient junk): ZTE Blade some CM11 build
Tablet 7": Novo 7 Basic running stock HC 3.2.1
Tablet 10": ASUS Transformer TF101 16GB running Team EOS nightly (build 26)

Phone(new): HTC One S S4 running Dark Jelly S CM10 build23
Phone(junk): Xperia P running resurrection remix or Honami MW
Phone(Newest): Galaxy S4 Mini running slimKat
-----
ლ(ಠ益ಠლ) Y U NO THANK ME? ლ(ಠ益ಠლ)
The Following 2 Users Say Thank You to Goatshocker For This Useful Post: [ Click to Expand ]
 
DerSandmann
Old
#2  
Member
Thanks Meter 4
Posts: 69
Join Date: Aug 2010
Location: Lausanne
I'll try it when I'll have the time =) Nice tutorial!

It's just stupid I can't see the images..
If my post helped you, don't hesitate to press thanks!

DerSandmann.
 
Goatshocker
Old
(Last edited by Goatshocker; 15th April 2012 at 06:10 PM.)
#3  
Goatshocker's Avatar
Senior Member - OP
Thanks Meter 407
Posts: 941
Join Date: Oct 2010
Quote:
Originally Posted by DerSandmann View Post
It's just stupid I can't see the images..

Son of a.... Youre right... Ill fix it...



edit: Pictures should work now.
Quick ADB Pusher v0.5 (discontinued)
--------------------------------------------------------------------
Phone(ancient junk): ZTE Blade some CM11 build
Tablet 7": Novo 7 Basic running stock HC 3.2.1
Tablet 10": ASUS Transformer TF101 16GB running Team EOS nightly (build 26)

Phone(new): HTC One S S4 running Dark Jelly S CM10 build23
Phone(junk): Xperia P running resurrection remix or Honami MW
Phone(Newest): Galaxy S4 Mini running slimKat
-----
ლ(ಠ益ಠლ) Y U NO THANK ME? ლ(ಠ益ಠლ)
 
Goatshocker
Old
(Last edited by Goatshocker; 16th April 2012 at 11:43 AM.)
#4  
Goatshocker's Avatar
Senior Member - OP
Thanks Meter 407
Posts: 941
Join Date: Oct 2010
Heres a "benchmark", or whatever you want to call it, showing roughly how fast the tablet charges.

Note that the screen was turned on all the time, and I used it occasionally.


It does indeed charge slower than the real wall-charger, but thats not strange considering theres a 3V difference.
The wall charger charges an equal amount in roughly 1:30h, during the same usage.


Edit: I forgot to mention, if you use this method you can extend the charging cable easily by just hooking up an addition audio extension cable
Do beware of voltage drops though, the cables aint exactly thick. My cable is around 4m total, and I get a voltage drop of ~0.5v from the molex to the female usb plug.
Attached Thumbnails
Click image for larger version

Name:	startpoint.jpg
Views:	205
Size:	91.6 KB
ID:	1006712   Click image for larger version

Name:	endpoint.jpg
Views:	193
Size:	90.8 KB
ID:	1006713  
Quick ADB Pusher v0.5 (discontinued)
--------------------------------------------------------------------
Phone(ancient junk): ZTE Blade some CM11 build
Tablet 7": Novo 7 Basic running stock HC 3.2.1
Tablet 10": ASUS Transformer TF101 16GB running Team EOS nightly (build 26)

Phone(new): HTC One S S4 running Dark Jelly S CM10 build23
Phone(junk): Xperia P running resurrection remix or Honami MW
Phone(Newest): Galaxy S4 Mini running slimKat
-----
ლ(ಠ益ಠლ) Y U NO THANK ME? ლ(ಠ益ಠლ)
 
Thing O Doom
Old
#5  
Thing O Doom's Avatar
Recognized Contributor
Thanks Meter 722
Posts: 1,530
Join Date: Mar 2012
Location: Phoenix

 
DONATE TO ME
I tried this and got to the extention cable section, I totally butchered my usb extension cable and gave up since I don't have another. Great guide though! I just can't cut and splice without completly failing and breaking things -_-
Is a B3ast?
NvFlash for B70+ Devices - Windows/Linux
PERI: A one-click Root and Recovery installer for .27 or less -- by me
The General ASUS Transformer tf101 Help Thread -- Ask Here

Device -- Asus Transformer TF101
Currently crack flashing...
KAT Kernel
Device -- Nexus 7
ReVOLT with TWRP
Franco kernel
--
If you need my help in a topic I have replied too but forgotten about, please quote my post and I will see it. Thanks for patience, I'm very busy c:
 
Goatshocker
Old
#6  
Goatshocker's Avatar
Senior Member - OP
Thanks Meter 407
Posts: 941
Join Date: Oct 2010
Quote:
Originally Posted by Thing O Doom View Post
I tried this and got to the extention cable section, I totally butchered my usb extension cable and gave up since I don't have another. Great guide though! I just can't cut and splice without completly failing and breaking things -_-

Thats where
Quote:
Originally Posted by Goatshocker View Post
Parts and tools needed:
....
Teeth (or a wire-stripper/cutter)
...
comes in ;D

Dont know how you managed to butcher the cable though , you just need to strip 2 wires (or 4, if you decide its easier to cut the white and green too), and wire them together.
Quick ADB Pusher v0.5 (discontinued)
--------------------------------------------------------------------
Phone(ancient junk): ZTE Blade some CM11 build
Tablet 7": Novo 7 Basic running stock HC 3.2.1
Tablet 10": ASUS Transformer TF101 16GB running Team EOS nightly (build 26)

Phone(new): HTC One S S4 running Dark Jelly S CM10 build23
Phone(junk): Xperia P running resurrection remix or Honami MW
Phone(Newest): Galaxy S4 Mini running slimKat
-----
ლ(ಠ益ಠლ) Y U NO THANK ME? ლ(ಠ益ಠლ)
Tags
alternative charger, charging, sync, usb
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


XDA PORTAL POSTS

Get Your Cargo to its Destination in 4×4 Military Operations Reborn

Racing games have evolved quite a bit since the days of Pole … more

Automate Your Device with Sfen

Changing the profile of yourdevice manually is now long forgotten. Since the advent of Android automation … more

Galaxy Photo Screen Lock Displays a Photo Slideshow on Your Lock Screen

Being the most often looked at part of our devices UI, the lock … more