Develop Bugs

Are iPad chargers compatible with Galaxy Tab 10.1?

I picked up one of these chargers:
http://www.macally.com/EN/Product/ArticleShow.asp?ArticleID=326
which, in principle, should charge the Tab. It does charge it but it also does some strange things while plugged in:
1. Starts MTP USB mode
2. Completely messes up digitizer - I've installed TouchScreenTune and in the test area I can see when I touch, sometimes the perceived touch seems to rapidly cross the entire vertical area and in regular use it will activate the status bar when I touch anywhere.
I exchanged it for this one:
http://www.macally.com/EN/Product/ipod4show.asp?ArticleID=391
It doesn't have as high a wattage output but still higher than a standard USB charger so should charge faster.
I still get:
1. MTP USB mode
2. not quite as messed up digitizer - seems to be okay in normal use but when I test it in TouchScreenTune I can see that the perceived touch is very jittery. It's now jittery only to a small amount of error so it's usable, but something is going on.
I've also found the tablet completely non-responsive to touch a couple of times today (not plugged in) and eventually it comes back but behaves very slowly until I reboot. I don't know if this has anything to do with the charger or just a coincidence.
I'm concerned with the behaviour of the digitizer that these chargers are doing something bad to my tablet. These behaviours don't occur when I use the official charger. I was hoping to get something with multiple charging ports so I have less to carry and plug in when I travel.
Should I be concerned about use this charger? If so, other than the official Samsung charger, does anyone know of a compatible multi-port charger?
Thanks!

You might be looking at different effects caused by different things.
1) There are two different kinds of USB cables for the Galaxy Tab 10.1: a data cable and a charger cable. These are slightly different. Using a data cable will still allow the Tab to charge, but probably slower. But this can cause the MTP USB mode to kick in (but this also depends on the charger)
2) Some chargers go way above the normal 5 Volt. With most devices that is not a very big problem. But capacitive touch screens are very sensitive to that. That's most probably what you notive. I see the same if I use some cheaper chargers.
3) I don't think your touch screen is damaged by the use of these chargers. If that would be the case, it would probably malfunction all of the time and not occasionally. Chances are a lot higher that you installed some new software or widget that is behaving badly.

USB chargers designed for apple devices in principle will not supply more then 0.5A to non-apple devices.
Apple uses a special technique to signal to the USB charger to supply more power, while non-apple devices uses a different technique. And unfortunately all the charger manufacturers only seem to consider Apple.
So all those chargers proclaiming 2.1A that you can find on Amazon or eBay are all designed for Apple devices. And don't believe when it says on Amazon or eBay that Android devices are supported. Read the reviews and you will typically find someone with charging problems with a non-apple device.

USB chargers are basically all the same except for the amperage that they put out. The stock GTab will not charge very well unless the amperage is around 2A. If you root, you can install a tweak that allows the device to charge with any amperage but with the typical .5A charger it will take a lot longer than with a 2A version.
I use the charging pucks for my iPhone and my wife's iPad interchangeably for those devices and my GTab. They all work fine. The iPad puck puts out about 2A and is about the same as the one that ships with the GTab. Since the GTab version is on my desk, I also use it to charge a bunch of other USB devices such as my hands free car speaker and some wireless headphones. I just plug the appropriate cable into the puck. I have not experienced any problems and suspect that I could use my wife's iPad puck the same way. (I have not yet tried this).
I just ordered a couple dual 2A USB car chargers that allow two USB cables to be plugged in, each getting 2.1A. From what I have been able to discover, these devices will charge just about anything as long as the charging cable has a standard USB connector. They come from China on eBay for less than $3 ea.
I will follow up this post with a review when they arrive.
Bob

USB chargers are not all the same.
"Modern" Adapters that implement the USB Battery Charging Spec, short the middle two data wires (D- and D+), the device can use that to detect that it can draw up to 1.5A (instead of the 0.5A that you get from a regular port).
Apple instead using a different (non-standard) scheme where they communicate to the power supply using voltages, and where different voltages represent different Amperage (I don't know the exact details).
So power supplies sold for Apple devices, as far as I have seen, do not short the data wires and as such a non-Apple device will not draw more then 0.5A
*edit*
Just to add to this, because apple devices communicates with the charger over the two data wires using voltages, while devices that implement the USB Battery Charging Spec require the data lines to be shorted, the two implementations are incompatible.
What you could probably do, is crack open a 2A apple compatible charger and just short the D- and D+ and have a charger that will charge non-apple devices up to 1.5A. And it should also be possible to put a switch on the charger to switch between Standard and Apple charging mode. But if you mess up, don't come and complain to me!
Here is a nice video on how the apple charging works for the iPhone on youtube. But unfortunately this crap forum software won't allow me to post outside links.
Just do a google search for "reverse engineering apple charger"

I made some usb adapters that plug between any usb port and galaxy tab 7.0 plus usb
I made some usb adapters that plug between any usb port and your samsung galaxy tab 7.0 plus usb connector that allows charging from any usb port. I think it's the same for any galaxy tablet/phone. This way you can charge from any pc, or generic wall charger, any car charger, etc. If you're interested in one let me know. I can list them on ebay or some other site.
See pictures, nothing fancy but they work perfect with any charger and or usb port
Pic 1 is adapter
Pic 2 is adapter plugged into portable 12000mAh battery charger made for apple products
Pic 3 I added another adapter I made in between to measure amperage
Pic 4 is screen shot showing "AC" not "USB" and little batter icon without RED "X"

sick of chargers all over house?

i have 4 devices so this unit was perfect for my needs or anybody sick of having usb cables all over the house. shipping was on time and unit was secure and safe and inside the box is a INATECK 4 Port Wall Charger and user manual and the manual was simple to read and unit easy to use regardless but nice to have incase its needed. the unit is sturdy, with a good weight to it which i liked as i just plugged unit in wall and now im ready to charge all my devices at once. unit also has a blue LED thats bright but i like that fact because i charge mostly at night and its easy to see without turning on the light. i tested the unit with a Iphone 5/GS4/GS5 and a ipad and no issues there using your devices usb. 2x 5V/2.4A (Super Charger) Interfaces: Supports 5V USB charged devices on sale (Most types of mobile phones,tablet PCs or digital devices);2x 5V/1A (Universal) Interfaces: Supports smart phones from iPhone, Samsung & other 1A USB devices are the spcs for the unit and those pretty much cover anybody looking to make charging your devices easy.
and for under $15 its a must for families or person with multiple devices. i have used other usb wall chargers but a key selling point to this unit is the built in surge protector which is also CE&FCC certified and in my opinion with the costs of our devices that is a great feature and also unit is premium high power enabled to allow full speed charging. really liked the product overall and the price is lowest i have seen plus all its features make it a must.
http://www.amazon.com/Inateck-All-I...words=inateck+4+port+compact+usb+wall+charger
https://www.youtube.com/watch?v=VVKnlZKBHcw

I'm using the same one in my room, it's really helpful. I wish homes came with this built-in already lol.

Just purchased this is awesome. Thanks for sharing

Just came back from a week long family vacation, 3 tablets and 2 phones - don't know what I would have done without this 40W/5port charger: http://forum.xda-developers.com/showthread.php?t=2608578

Charge N7100 through wireless pins, but with wires?

Hi All
I am currently in the process of installing my Note 2 into my car as a permanent fixture for media and sat nav. It is now flush mounted in fibreglass in my dashboadd, charging through USB and audio through 3.5mm. I want to use my UCA202 DAC which will allow better sound, but crucially allow me to mix my main phone audio through it for handsfree. For this I need to be able to charge and use OtG at the same time. This I know has been done to death, but what I haven't seen follows...
It is known that you can retrofit an inductive coil for wireless charging but it's slowslow. My question is, has anyone tried hard wiring 5v from a USB cable DIRECTLY to the 5v pins inside the back.? Is this likely to work or will the hardware specifically expect to see resistances etc associated with a coil? If it does work does it fast charge? If over 500ma?
It doesn't matter if it looks dirty because it'll be hidden behind my dash. Just curious if anyone has tried it before I try and send my phone up in smoke
Cheers

Sorry can someone please move to Q&A. Not been here a while and didn't see the button. Ta

I don't think so. It is limited to 1A tops i think (can go higher, but 1.2A is already dangerous.), so Your best call is to get an OTG Y-splitter which lets you charge + otg at the same time, but i can't tell You im 100% sure about that (about 95% sure it will work, since my multimedia dock is basically same thing, but along with MHL and audio jack.

USB Charging with newer devices

Short version: what is the best way to charge a newer device from a USB port that only outputs 0.5a?
Long version:
Been out today in my new car and tried charging my phone from the built in usb... didn't do anything. Makes the charging noise on the phone but no charge.
Obviously I'm guessing it must be only outputting at 0.5a which is very low for today's devices... what can I do? Is there any way to bump up a 0.5a to higher easily (appreciate this might vary by a billion factors, but guess the USB is coming off the car's 12v rails somewhere along the line...)
Another thought that came to me was putting a battery pack that charges slower in the middle, but i don't know if this will work given that i'll probably be drawing more than i'll be getting in to it... and can they even charge as they are outputting?
Any thoughts welcome!!
Cheers
Xperia Z5

Silly question, but have you considered buying a separate phone charger that plugs into the cigarette lighter?
If your device supports Qualcomm QC 1/2/3 there are car chargers that support that protocol. If your device only supports 5V charging, there are chargers that put out up to 2.4 Amps.
I'd recommend purchasing one from a well know brand like Anker (I've only ever purchased 1 charger, it seems to work fine and it was this brand) or several phone manufacturers and cell providers sell their own.
If you absolutely MUST be plugged in over USB (for multimedia?) I don't think there really is a good/safe way to "boost" the output of the port in your car. They provide the USB port so that they can check the box on the features list for "Yes we have a USB port". They're doing this at as low of a cost as possible with little regard for how well it works or if it will charge your device well.

That's what I've ended up going for. It's not ideal as the USB is in the way of the gearstick a bit, but it's all I have. If I come up with a better way then I'll let you know!!

Bargain USB-C cables

Package of 3 for $8(after $5 instant coupon), not bad. Quality wise, OK. Must take an advantage of high speed N10 UFS3.0, just tested them and everything checks out fine.

No good for new charger though (usb-c to c). Still handy to have around for other chargers too. I need some bargain 3amp usb-c to c cables

scarygood536 said:
No good for new charger though (usb-c to c). Still handy to have around for other chargers too. I need some bargain 3amp usb-c to c cables
Click to expand...
Click to collapse
Some of the aftermaket 45W bricks should be safe enough to use with these cables but I won't be using 45W charging on my Note 10+ anyways, I'm concerned about effects it may have on the battery in the long run. 25W charger would be plenty enough for me. The cables though, I need them for transferring large files, 4k videos and such, to my desktop storage. I don't like the convenience of 'cloud' storage. Whose convenience?:laugh:

scarygood536 said:
No good for new charger though (usb-c to c).
Click to expand...
Click to collapse
I see what you mean, didn't realize that all the high power bricks use "C" as connection standard. Here is some adapter which probably could serve as a spare, something to keep in a drawer just in case:

You have to be carefull buying usb adapters for the new notes as i had problems with a usb c to aux , they dont work , i have tryed 5 different models and each just give the message unsupported , so no sound through standard or expensive headphones , seems like samsungs own adapter is the only one that works , which is a pain seeing as i cant get one in shops or on samsungs nl shop.Just because its usb c does not mean any adaoters will work on newer samsung phones missing the headphone jack , bit tight fisted the adapter was not in the box on the first note without the headphone jack as apple did give the adapter for the first 2 years phones , now they dont and for over 1000 for a phone its bad no flagship comes with this cheap adapter.