Does anyone know where I could get some microUSB charging cables with the D+ and D- data lines shorted already? (i.e. charging cable only, not for data).
Rather not take apart (Read: Destroy) my microUSB cables I use for data. I have USB wall-warts and USB cigarette lighter adapters which supports drawing 1A from the ports.
Thanks!
Cheers,
Kermee
If your like me and still have plenty of mini usb devices around, you would be best off getting a mini to micro converter off ebay, these already have the pins shorted so my wife and kids can still charge up their stuff and its quite easy to pop on/off the adapter depending on what you want to charge.
There's an easy method to "short" the data pins.
You just need a short USB "leading" (6-12' or 15-30cm extension) cable, a piece of double-sided tape and aluminum foil.
stick the tape to the foil, then cut to the size that can cover both center pins on the jack side of USB leading cable, and plug the microUSB cable, that's it.
You can do the same trick for PSPGo stock USB cable too!
I'm interested in this too. Anyone know of any sites? or at least a microusb to microusb WITH shorted pins adapter?
PhantomRampage said:
I'm interested in this too. Anyone know of any sites? or at least a microusb to microusb WITH shorted pins adapter?
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You have to custom make it.
Do you know of any tutorials on how to do this?
Sorry for the bump but i really want to try this out, can anyone give me more specific instructions? I dont know too much about cable wiring
Buy a USB extender cable, cut the cable in half, connect the red from the plug side to red from the socket side, connect black from the plug side to black from the socket side, leave the white and green from the plug side unconnected (tape over the ends), and twist together the white and green from the socket side. Solder, then electrical tape or heat shrink all the connections. Now plug the cable into any USB charger that provides 700-1000mA, plug your micro-usb cable into the socket end, and plug it into your phone.
Thanks man, i appreciate the help.
Got it working :]
I've decided to make my own cables. Then using red heat-shrink tubing where I made the cut & modification so it would denote it's for "USB charging" only with the data-lines cut ("floating) towards the host and bridged/shorted on the device side.
I was going to make several of these so if there's enough interest, I'm willing to make several extra of these to sell for a nominal price if anyone is interested.
Cheers,
Kermee
I have one of these, for charging only, which I have plugged into my work computer.
Picked it up at some store near where I live, in Hong Kong.
Had no idea it was just for charging (actually, didn't even know you could buy such cables).
I'm probably going to get rid of it though, as I would like the ability to transfer data as well.
You do know that your phone will charge twice as fast with that cable right?
PhantomRampage said:
You do know that your phone will charge twice as fast with that cable right?
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Yep, the charge on the cable at work is really slow! But I'm not too bothered as it just sits there during the day.
Be aware of that, the phone may get hot when charging because more current is allowed to speed up charing.
mingkee said:
Be aware of that, the phone may get hot when charging because more current is allowed to speed up charing.
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Yes, it does get a bit hot.
In any case, like I said, I'll probably buy a proper sync cable instead in the next few days.
pokey9000 said:
Buy a USB extender cable, cut the cable in half, connect the red from the plug side to red from the socket side, connect black from the plug side to black from the socket side, leave the white and green from the plug side unconnected (tape over the ends), and twist together the white and green from the socket side. Solder, then electrical tape or heat shrink all the connections. Now plug the cable into any USB charger that provides 700-1000mA, plug your micro-usb cable into the socket end, and plug it into your phone.
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Just wanted to say thanks for posting up this info (for some reason thank button isn't showing for this thread). Ordered some USB extension cables today, can't wait to try this out. I've long been plagued with not getting enough juice my USB car charger, now I know why.
Edit: BTW, what's the reason for using the USB extender cable for this, couldn't you just cut an existing USB cable in half and short the D+/D- wires? I'm guessing you cut the extender cable so that you can disconnect the intact USB cable and then it would still transmit data if you desired?
cryptiq said:
Edit: BTW, what's the reason for using the USB extender cable for this, couldn't you just cut an existing USB cable in half and short the D+/D- wires? I'm guessing you cut the extender cable so that you can disconnect the intact USB cable and then it would still transmit data if you desired?
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You could do that too if you like. I have a big pile of 4" extenders from USB flash drives and wifi dongles and didn't really consider cutting up a microusb cable.
pokey9000 said:
You could do that too if you like. I have a big pile of 4" extenders from USB flash drives and wifi dongles and didn't really consider cutting up a microusb cable.
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Just to confirm that I'm understanding the shorting of the D+ / D- wires together, the short needs to be on the side of the cable which is connected to the phone, yes?
The D+ / D- wires which are on the side of the cable plugged into the car charger just need to be covered w/ electrical tape and not touching each other when connected back together, yes?
I drew out a sketch based on your outline of what's connected back to what, and that's what I came up with. The shorting of the D+ / D- wires going to the phone must be how the phone realizes that there's not a data connection to be made, so instead will just look for max power? If the D+ / D- lines weren't shorted when connected to the phone (but instead just not connected based on the cable), would the phone just assume USB and charge slower at that point?
Thanks for your help and clarification! I think I'm understanding what you're outlining.
jones4725 said:
Just to confirm that I'm understanding the shorting of the D+ / D- wires together, the short needs to be on the side of the cable which is connected to the phone, yes?
The D+ / D- wires which are on the side of the cable plugged into the car charger just need to be covered w/ electrical tape and not touching each other when connected back together, yes?
I drew out a sketch based on your outline of what's connected back to what, and that's what I came up with. The shorting of the D+ / D- wires going to the phone must be how the phone realizes that there's not a data connection to be made, so instead will just look for max power? If the D+ / D- lines weren't shorted when connected to the phone (but instead just not connected based on the cable), would the phone just assume USB and charge slower at that point?
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Yes, leave the charger side (USB plug) unconnected and preferrably insulated, and the phone side (USB socket) shorted. Before a USB link is established, both a USB host and USB device will set and check for different voltages on the D+ and D- pins to determine what's at the other end. This is just an extension of that and is safe for the device.
pokey9000 said:
Yes, leave the charger side (USB plug) unconnected and preferrably insulated, and the phone side (USB socket) shorted. Before a USB link is established, both a USB host and USB device will set and check for different voltages on the D+ and D- pins to determine what's at the other end. This is just an extension of that and is safe for the device.
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Thanks very much for confirming! I'm going to short two micro USB cables I've got for car use only.
Running stock gb. Is there an app to make my phone switch to AC charging when using my car charger? I know I can solder pins 2 and 3 together to get the effect. I did that to my old charger, but I have a new charger and I don't want to modify it. I am going to solder a small USB extension cable if not. Thx
How to generate AC signalling when charging from USB port.
bark777 said:
Running stock gb. Is there an app to make my phone switch to AC charging when using my car charger? I know I can solder pins 2 and 3 together to get the effect. I did that to my old charger, but I have a new charger and I don't want to modify it. I am going to solder a small USB extension cable if not. Thx
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You can make it with extension cable, a resistor (50 K ohm min , 150 K ohm max) and PVC insulating tape. Cut the extension cable so you will have 2 ends with 4 wires.
red as Vcc+ 5V
white and green as D+ and D- (data)
and black as ground.
Lets assume that the big USB plug you gonna plug on the charger, is the input to our modification, and the wire with the female plug is the output of our modification.
We don't need the green and white data wires that coming from the input, since those are the "USB" signals. We need only the 5V voltage which is the red and black, so we must insulate with tape white and green. Don't strip them, just insulate.
On the output cable with the female USB plug we still have 4 wires and we gonna connect the ground directly with the input ground. Strip the ends, twist together and insulate with tape.
Then connect the red wires (input and output) and the resistor one end ALL Together and insulate with tape. (3 points as one - red, red, resistor)
Strip wires, twist together with resistor's one end and insulate. Leave resistors other end free for later.
Then strip and connect the output signal wires together (the green and white you have available) with the resistors free end. (3 points as one, white, green, resistor's 2nd end). Strip wires, twist all together, Insulate with tape and you are ready. You can insulate the resistor with tape and all the wires together so it will be nice looking. Try to make it straight and not too thick.
If you have the battery widget application by ELVISON installed you will see that your device has switched to AC mode.
Also, this is going to work as AC on a usb port of a PC. Good luck!
Going on the above post you could use a micro extension cable and just create a short six inch extension that can be used on any usb cable.
Why would one do this?
The microUSB charging spec requires a dedicated charging port to have two of the pins shorted together so that the phone can detect that it isn't a USB port/hub on the other end. A USB port can only supply 500 mA whereas a charging port (one that isn't trying to pass data and has the two wires shorted) can supply 1000 mA.
Many "cheap" (and a lot of "expensive") car adapters don't have the pins shorted so the phone thinks there is a live USB port on the other end and "protects" it by drawing under 500 mA from it. As a result, they only charge the phone "half as fast" as they could (assuming they could put out the full "1 A" = 1000 mA, check the label).
The "fix" is to short the pins together, either in the charger itself, or in the connecting cable.
The "fast charge mode" some kernels and ROMs supply basically tells charger in the phone, "Ignore what the cable is telling you, just turn off USB data and pull 1000 mA." Hence the warnings that you may permanently damage your computer or charger.
How can I enable fast/quick charge ability on Nexus 5. I notice that with the OEM cable I get fast charge on my wall outlet but if I plug in any other cable it doesn't charge at more than 500mA. Is there anyway I can make it fast charge with any cable or is there a cable that I can use that is longer than the OEM one that will put the phone in fast charge? I use CurrentBattery widget to determine the current.
Thank You.
Custom kernel is the way to enable it.
What ^ said
Sent from my Nexus 5 using Tapatalk
Milocha said:
How can I enable fast/quick charge ability on Nexus 5. I notice that with the OEM cable I get fast charge on my wall outlet but if I plug in any other cable it doesn't charge at more than 500mA. Is there anyway I can make it fast charge with any cable or is there a cable that I can use that is longer than the OEM one that will put the phone in fast charge? I use CurrentBattery widget to determine the current.
Thank You.
Click to expand...
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[FAQ] Charger mod, howto USB fast charge.
http://forum.xda-developers.com/showthread.php?t=844284
Get yourself a short USB extender wire, male at one end, female at the other.
Cut the wire in half.
Connect the red and black wires up as they were before (or don't cut them in step 1).
On the Female side of the wire connect the green and white wires together.
On the Male side of the wire simply leave the green and white wires connected to nothing.
Insulate the ends of all of the wires with insulating tape.
Tie a knot in the wire so if the wire is pulled the knot is pulled and not the connection you made, it doesn't look pretty but the wire will last a lifetime this way.