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Build a charger for your Touch 3G

Hey guys. I have had a few PPCs in the past but the Jade is my first SmartPhone. I like to charge my PPCs in the car as I use them for navigating. I use a universal holder plus I dismantle one of these
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as they are easier to wiggle into any dashboard gaps you might have. They are pretty readily available on eBay, but note that they tend to have pretty low guage wire and aren't configured as twisted pairs so it is pretty hit and miss using it to transmit data but it seems to have no problem transmitting DC current. I have used this for very long trips using devices that pull about 1A of current and the cable doesn't warm up so I presume the resistance must be low enough for charging purposes.
Simply connect the other end to a USB Car Charger and you are nearly ready to go. Connecting it up this way will trigger charging but I suspect the device assumes it is connected to a PC as it turns the screen on when you connect it this way as apposed to the Wall Charger where the screen remains off. Careful using USB Chargers designed for other devices (Ipod etc) as they have configurations which may confuse / damage your device. I found this out the hard way when I connected my Jade to an Ipod USB Car Charger which caused all sorts of grief with an undetectable microSD card, the device refusing to turn off which although is now resolved, I am still uncertain whether I haven't caused some damage
So how do you convince the Jade to charge from your Car Charger like a Wall Charger? Well first thing to be aware of is that devices that implement USB charging have various methods of detecting a connection to a Wall Charger as apposed to a computer. As I have mentioned, the iPod (and my old iPaq) uses a resistor configuration between the Ground, 5V and Data Pins to tell the device that it is connected. Fortunately the Jade is much simpler. I have determined from searching the web plus attacking my Wall Charger with a multimeter that all that is required is that the Data Pins are bridged and that the Metal Socket Surround is connected to the Ground Pin (which it is anyway in most Generic Chargers). All that was involved in mine was opening the Charger, finding the middle data pins on the circuit board and dropping a solder bridge between them. Make sure you buy a good quality USB Car Charger that is easy to dismantle (mine was held together by screws) and can provide at least 1A.
Enjoy

My previous phone was a palm treo pro (htc panther), for which i bought a sprint car charger (micro usb). The first charger that was sent to me was heavily used, so i complained and got a new one. After i returned my treo, i got the jade and decided to sell the new charger and modify the old one (which was working fine, except the connector didnt connect properly) to charge the jade. So i opened it up and soldered the two (+ & -) wires to an old usb extension cable, so that now i have a car plug with and usb(-a) socket slightly standing out. When i connect my mini-usb cable for the jade only the charging led lights up.

What did you do with Data Wires? If you joined them together then you have achieved the same outcome as a solder bridge.

Nothing, i just cut them as short as i could. They dont connect to each other...the outer ground isnt connected, too...

USB connection physically dead; not charging or usb to pc connection

Hi everyone!! i'm desperate since i think i came with an expensive, unusable phone in my hands.
I read and searched thorough but there doesn't seem to be much clue on this, just one or two lost threads....
Someone care to drop a hint to help me ? ive lost all hopes.....
My x10a, after using it for , say, 1 month, rooted with latest xx23 firm (and used for a week or more , perfectly fine) ... some days ago, it stopped recognising USB port.
IT does not charge, with no existent charger or usb cord; it does not recognise usb connection of any kind, to any computer possible.
It lasted till last battery charge died, and no way to resucitate.
Afterwards, i came up with something: i bought a crappy, chinese battery-charger, drop my X10 battery overnight, and the phone then booted and worked fine.
So it is the USB connector/port/circuit. I even though of reflashing or re-rooting, but you can figure out that i can't do that anymore (no usb :S).
I can't give it back to SE or seller since it was brought overseas, and it even has some little marks on the corners (they'll just claim i dropped and so).
Any caritative soul please?
I opened following McKebapp guides, but didnt find nothing in particular.
Do you think i should risk in getting hands dirty and, say, re-solder an usb jack?
If not, i offer in sell all spare parts, almost new, or even sell it at a very good price, e.g. for bootloader experimenting....
Thanks !

Are you sure there is no gunk in the port or the cable's contact itself? Or even a bad cable?
Try this.
(1) Buy yourself a can of contact/electronics cleaner spray.
(2) Remove battery from phone to ensure you have no power going through there.
(3) Spray area clean and wait for it to dry.
Afterwards put battery back in, power up and plug in. See if that works

Yes, i tried all these... but nothing... Of course, i tried using up to 10 different usb cables, even bought new ones... but the strange thing is that nothing really happened, in order to mess or 'break' something on the phone...it was from one day to another... strange....

I wonder if the port is soldered to place on the board or is just spring contact based. I believe Bin4ry had his phone disassembled - you can ask him. If it is spring loaded contacts - there might be dirt underneath that needs to be cleaned up. If it is soldered - a joint might have broken and need resoldering.

mtechfan said:
Are you sure there is no gunk in the port or the cable's contact itself? Or even a bad cable?
Try this.
(1) Buy yourself a can of contact/electronics cleaner spray.
(2) Remove battery from phone to ensure you have no power going through there.
(3) Spray area clean and wait for it to dry.
Afterwards put battery back in, power up and plug in. See if that works
Click to expand...
Click to collapse
OMG... NEVER do that to a PCB with BGAs...
You'll shorten the connectors underneath the BGA soldered chips by fluid that stays there thanks to capillary action.
@rodrigofd:
Here you can see the USB connector itself, on the very left side:
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IF there is any mechanical failure, one or more of the five solder points in the middle of the connector is loosened.
But I can't believe it's a mechanical / solder problem.
Wiggle the USB charger cable a little, while having it plugged.
That way, you'll determine if there is any hairline crack.
If there is any, you can think of resolder it..
If you ask me, I'd say, some SMD fuse has blown up or there is an hairline crack between the PCB layers.
To determine that, you'll need a 3rd level schematics and some electric circuit reading knowledge.
If nothing helps:
Wait till there is a OTA Update that unroots the phone.
Then bring it to service..

The same thing happened to mine. While it was charging on my desk, and I was asleep.
I woke to find the phone on the floor but the USB cable was attached.
Using JuicePlotter (which had been running) it seemed that the phone had stopped charging around the time I had missed a call.
My detective skills allowed me to deduce that the phone was fine, but then when it rang - and started to vibrate - it rumbled its way off my desk. I believe it was not hitting the floor that damaged it - it's carpeted and not much of a drop - but the shock to the USB cable port as it swung itself off mydesk, effectively "hanging" itself.
I'm afraid I had no luck fixing it but it was only a week old so O2 replaced it immediately.
These days I ensure the phone is FIRMLY wedged somewhere when charging it.

Charger Keeps Burning Out

Does anyone else's charger keep dying/burning out/burning up? I've had my TF since July and after 5 weeks it decided it didn't want to charge anymore, so I sent it to the Asus repair center in Houston, Texas and it came back three weeks later and everything was fine.
I just got my dock two days ago and pretty much had the tablet connected to the dock and the charger connected to the dock for almost all the time I was using it since it was taking forever to charge both batteries. By the end of the first night the tablet was completely charged and the dock went from about 4% to 80% during the whole time I had it charged (but I was using it at 1.4GHz with the screen brightness all the way up). While it was charging the power brick (the actual transformer lol) was getting really hot, almost too hot to touch, but I know those normally get hot when they charge stuff so I didn't think anything of it.
I tried to finish charging it yesterday and noticed that it stopped charging (again). I checked my AC power cables and everything was connected, I re-seated the usb end into the adapter, rebooted the tablet and tried connecting the charger to both the tablet and the dock. Neither would charge. I also tried the adapter in different outlets too. I'm not going to send it back to Asus this time since AFAIK there's nothing wrong with the tablet or the dock itself, I'm just going to shell out $40 and get one off of ebay. If that doesn't fix the issue then I'll send it back because I don't want to be without it again for three weeks.
Has anyone else had this happen to them more than once?

Funny you post this. Mine stopped charging last night. I know the cable is good because I can hook it to my computer and transfer data. However plugged into the actual power transformer, it will not charge. Tried many different outlets and did my best to make sure it was not damaged.

I think we need to find a good way to charge it from USB 3.0 ports on the PC by buying a PCI card or whatever, and keep the power brick for traveling
They seem very feeble
I still have my first one but it stinks of burned electricals

It's bull**** that they don't sell the chargers separately and there aren't any third-party chargers available. I think I'm going to try the charge from PC mod for my normal charging duties since my PC is always on and my PSU is 850w.
Why can't we just directly charge from a USB 3.0 port (or two of them for that matter with a y-cable like they do for portable HDDs)? I may have to rig something up with the help of my father who's an electrician

magicdave26 said:
I think we need to find a good way to charge it from USB 3.0 ports on the PC by buying a PCI card or whatever, and keep the power brick for traveling
They seem very feeble
I still have my first one but it stinks of burned electricals
Click to expand...
Click to collapse
The USB 3.0 port on a pc will not charge unless you want to leave it overnight turned off. The power connector/connector on the TF is a physical USB 3.0 connector, BUT not an electrical 3.0 connector.

If it's not an electrical connector (odd thing to call it since these run off electricity no matter how you spin it, but I know what you mean ) then how does it get charged using the power brick? Are there leads in the cable that are specifically for power and not for transmitting data (meaning they don't connect to anything in a USB3 port on your PC)?

I was able to fix mine by throwing my power brick into the freezer for about a half hour or so. I followed this thread.
http://forum.xda-developers.com/showthread.php?t=1284303
I was about 1 click away from buying a universal Dynex one that is on amazon and then read around, so far so good. Hope it works for you.

I just made my own PC charger and so far so good, I didn't even have to buy anything!
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brando56894 said:
If it's not an electrical connector (odd thing to call it since these run off electricity no matter how you spin it, but I know what you mean ) then how does it get charged using the power brick? Are there leads in the cable that are specifically for power and not for transmitting data (meaning they don't connect to anything in a USB3 port on your PC)?
Click to expand...
Click to collapse
Both usb 2.0 and 3.0 have one 5v power and gnd line with limited current capability. 2.0 has one pair of data lines. 3.0 has two pair of data lines. The TF power cord is essentially a 3.0 cable with coductor # 7 ( part of a data pair in 3.0) used to sense a gnd signal from the tablet to tell the power brick to output 15V on the normal 5v line. If the brick does not see the gnd on pin7, the 5v line only outputs 5v. This is why a 2.0 usb extension will not work.There is no conductor 7. Best bet buy the dynex video camera adapter and set itt for 15v to the usb connector.

[Q] Wireless Charging Problem

I bought a generic QI charger at DX and it worked well... once. The next day the phone was not recognizing the charger.
I really think that's a software issue because I tried a hard reset by flashing the original 4.4.2 stock rom image. it worked once and it stopped again. Then, I tried flashing stock again but it didn't work. Also, the charger seems to recognize that there is a device with wireless charging capacities but it turns off after 2 seconds.
Is there an activity or something that makes the system recognize the charger and start in fact charging? I searched a little bit but I can't find someone with the same issue

Have you moved the phone around on the charger? I have found out that the phone qi receiver is low on the phone and the transmitter is usually in the middle of the charger. That will give you the on/off back and forth.
Sent from my Nexus 4 using Tapatalk

BigCrisco39 said:
Have you moved the phone around on the charger? I have found out that the phone qi receiver is low on the phone and the transmitter is usually in the middle of the charger. That will give you the on/off back and forth.
Sent from my Nexus 4 using Tapatalk
Click to expand...
Click to collapse
Yes. I also searched the exact spot where the coil is located, it can't be. also, the charger recognizes de device

i had the same issue, it would detect then it would lose its connection, it comes down the the quality of charger, the magnetic pull is weak so it may drop after a few seconds, i ended up getting a better one,i dont exactly know why it droped even when the phone has not moved,
is your charger a small disc or a flat rectangle larger than the phone?

republicano said:
i had the same issue, it would detect then it would lose its connection, it comes down the the quality of charger, the magnetic pull is weak so it may drop after a few seconds, i ended up getting a better one,i dont exactly know why it droped even when the phone has not moved,
is your charger a small disc or a flat rectangle larger than the phone?
Click to expand...
Click to collapse
yeah, could be. I don't know, it's just weird that it worked once. It's a flat rectangle.

DTHayakawa said:
yeah, could be. I don't know, it's just weird that it worked once. It's a flat rectangle.
Click to expand...
Click to collapse
I noticed it has to be on perfectly, I have a small one and I'm noticing its difficult to get it to charge, it seems to tickle 90% of the time I'm thinking of opening it and do a few tests,
On mine it states, if the power is irregular the charger will disconnect and stop, intermittent etc, the light will display that, if the charger is not strong enough then It can do that aswell.
My qi is 1500mah output while my charger is 1200mah and its efficiency is 75%, so at 900mah its still fine for the nexus, I will test with a 2amp charger and hope it dosnt just make it hotter
Its anoying that this has not be a substitute to connecting it directly.

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This is how mine is positioned. The SIM card slot on the side is aligned with the charger coil on the phone, so you can use it as reference. Also make sure you're using a charger with not less than 2000 mA. Also try a different phone to test the charger if you can, just to rule out your phone as the problem. Good luck

republicano said:
I have a small one
Click to expand...
Click to collapse
Too much information.
Sent from my Nexus 4 using xda app-developers app

[Q] Broken microUSB port, not charging or data working.

Hi,
I don't know if I'm posting in the right section, but here is the thing. I've got GeeksPhone Keon Developer Preview, It's a Firefox OS phone, but I've flashed an Android version on it. Everything worked great for about 6 months, and then the phone stopped charging, and it was also not detected by PC. When I plug it to a PC the phone does not detect it's plugged in also the PC does not detect the phone. I tried other microUSB cables and it's the same. I also tried flashing the Android again as I thought maybe it's software related but the problem still exists. Hopefully I installed recovery on it. I currently charge the battery externally, everything else works as expected.
Yesterday I decided to mess with the phone, as I don't have the warranty. I opened it up and checked if the phone actually has power when plugged to the charger. I noticed that the battery is powered so It is charging but the Android OS does not detect that, and decreases the battery via software. I think that the D+ or D- pins are broken, and I'm not sure if they are used for the phone to know if it's charging.
Here is the picture of the circuit board and my findings. Camera is not great so the picture is not that great also.
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0. Is the microUSB port, and I guess there is a problem with it, maybe D+ or D- pins got broken.
1. Those are D+ and D- resistors they are good I've tested them.
2. Those are battery pins. When I probed them when micro USB is plugged in they have power.
3. It's some kind of a IC for power, I think it's used to switch power to the battery from microUSB.
I don't have that good soldering skills so I couldn't resolder the microUSB port, so I'm asking if someone knows another approach to enable the charging via software, as software does not detect that battery is charging, when actually power from microUSB comes to the battery, and because of that it decreases the battery status on Android.
So I'm thinking if I can execute some command so I can trick the phone to believe it's charging, so the battery will charge and when I plug it out I execute the second command to turn off fake charging?
Thanks in advance!

Funny that you have this problem, I just fixed mine today that had the same problem. Basically the micro usb port stopped working because the parts soldered on the motherboard were loose after too much wiggling (cheap mtk phone I guess). I tried resoldering but its just too small, I could not event test the connexions with a multimeter. So I went to one of the million of asian cell phone shops in indonesia where I'm actually travelling and paid 5$ for a guy to fix it. They do it all the time and have expert fingers. Not my phone plugs perfectly, try to find one near your place, wherever that is
Sent from my P5 using XDA Free mobile app

vita94 said:
Yesterday I decided to mess with the phone, as I don't have the warranty. I opened it up and checked if the phone actually has power when plugged to the charger. I noticed that the battery is powered so It is charging but the Android OS does not detect that, and decreases the battery via software. I think that the D+ or D- pins are broken, and I'm not sure if they are used for the phone to know if it's charging.
Click to expand...
Click to collapse
What happens if you put a charge over those connections? It won't accept any? Or does it charge but the software isn't detecting it? Another way of fixing it would be making a separate charger for your battery only, of course that would mean that your phone is useless while charging. I'm pretty sure if you force a charge over it it will absorb it, but I wouldn't exactly know how you could check the battery status so that you don't overcharge it this way.