Hey guys,
If I use a 2 USB Type A male (1 for power from the Asus wall usb charger and the other for data from a computer) to a female Type A USB being plugged into the provided Asus Charge/sync cable, will it charge and sync at the same time or is the cable or hardware in the TF300T just not capable of doing both?
In case you are wondering, here's the cable we are using but instead of MIcro USB, its a female type A USB.
Thanks for your help.
Kits2GR said:
Hey guys,
If I use a 2 USB Type A male (1 for power from the Asus wall usb charger and the other for data from a computer) to a female Type A USB being plugged into the provided Asus Charge/sync cable, will it charge and sync at the same time or is the cable or hardware in the TF300T just not capable of doing both?
In case you are wondering, here's the cable we are using but instead of MIcro USB, its a female type A USB.
Thanks for your help.
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Click to collapse
Don't bother doing the split that way -- there's a much better way to do this, assuming you're on a desktop. The Asus Transformer tablets will go into rapid-charge mode even at 12V (max 15V) on what's typically the 5V line. So if you use the existing 12V rail from your main power supply and send it through the 5V line, the tablet will charge and communicate over USB at the same time.
Make sure you isolate the 5V lead, otherwise you'll risk blowing something up by feeding 12V back into your motherboard.
Related
So this may be a silly question, but I've just received the T-Mobile MDA (HTC Wizard) second-hand and without a charger.
The Mini USB port on the bottom allows ActiveSync and charging from my notebook's USB port, but when I try to charge using an AC-to-USB adapter it doesn't work... I've tried two different Motorola phone chargers and a generic one that came with my Jawbone that has a USB female connector on the adapter and you supply your own USB cable. I've used the same cable I was using when attaching to the PC, but no luck.
Interestingly enough, I did get it to charge with the same USB cable once at an airport by plugging it into the Southwest Airlines chairs with the USB power plugs...
So does anyone know? Does this phone require a special sort of charger?
you need a charger that is rated 1.0Amps.
usb is normally 500mAmps, not enough to charge your phone.
1) Is there a difference between the Original Nook power adapter and the NST one (as far as power output)?
2) Will the nook usb power cord work the same as a generic micro usb cable? I know for instance the nook color cable has extra pins in it to provide more power.
Thanks!
Don't know about comparisons to the original Nook, but the USB cable provided with the Nook Touch is just a standard micro-USB cable. The Nook Touch doesn't need as much power as the Nook Color does.
dpippin said:
1) I know for instance the nook color cable has extra pins in it to provide more power.
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Click to collapse
There are no extra pins.
However, as per the USB spec, the center two pins are shorted* together, indicating that the charger is a 'high current' device. Otherwise the device you are charging will assume it's connected to a pc usb port and limit power draw to ~500mA.
*either directly shorted or through a resistor
*There are extra pins.
An OTG (USB On-the-Go) micro USB cable has the fifth pin near the ground.
It is shorted to ground directly at the connector to indicate possible host usage.
This has absolutely nothing to do with charging though.
bobkoure said:
There are no extra pins.
However, as per the USB spec, the center two pins are shorted* together, indicating that the charger is a 'high current' device. Otherwise the device you are charging will assume it's connected to a pc usb port and limit power draw to ~500mA.
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Click to collapse
The NC micro USB cable does have extra pins. This was verified through a physical examination of a NC cable:
http://forum.xda-developers.com/showthread.php?t=1090504
Has anybody tried this: 1. Setup a powered USB hub plugged into the Micro OTG cable 2. hack the cable from right after the OTG cable to where it plugs into the hub, so that the voltage pins are exposed 3. solder in the voltage pins to a usb connector so you can plug in a normal charger [5V 2A] 4. check to see if you can use the USB hub and charge at the same time
I currently have a Asus transformer TF101 and the primary use is watching clips off a 500GB usb HDD. I really, really want to get a N7 and sell my TF101, but if charging & simultaneous host mode is not possible, I would be slightly hesitant to buy it, because I would be eating up the battery much faster than I would like.
Sent from my Nexus 7 using xda premium
An OTG cable is not for charging/connecting your device to a computer. Instead of usb micro to a male usb, it's micro to female usb, so you can plug in peripherals and flash drives etc. to your device.
Sent from my SGH-I777 using xda premium
When a normal USB is plugged in, the Nexus is in "slave" mode. Receives instructions.
When an OTG cable is plugged it allows it to be in "master" mode. Can give instructions.
Sent from my Nexus 7
Stop... MUFFIN TIME!!!
There are basically 3 types of cables you can plug into the USB port of a Nexus 7:
1. A normal USB-to-microUSB cable, plugged into a computer or a USB charger. Either way it charges, and if it is hooked to a computer the N7 is in Client Mode and you can transfer files as well.
2. High-current chargers (like the one that comes with the Nexus 7). The data lines on these are shorted together; this tells the Nexus to accept higher current on the power lines for faster charging.
3. OTG cables have the normal 4 wires on the USB end - two for power, two for data - but on the microUSB end there is a fifth connection called USBID. Normally (as when using a normal 4-wire USB cable) the USBID pin is floating, i.e. not hooked to anything. On an OTG cable, the USBID pin is connected to the ground wire. This tells the N7 that an OTG device is plugged in, which causes it to do two things: it reverses the current on the power lines - because it needs to power whatever you have plugged into the OTG cable, like a USB card reader or keyboard - and it switches the USB interface from Client Mode (which it uses when it is plugged into a computer, because in that instance the N7 is a peripheral device) to Host Mode (because in that instance the OTG device is the peripheral and the N7 is the 'computer').
There is one other option for charging: the pogo pins on the side. (The 4 pins are 5V, stereo left, stereo right, and ground.) Providing power to the pogo pins (as when it is put in a dock) tells the N7 to accept high current on the pogo pins. Momentarily connecting 5V to the right stereo channel tells the N7 that external speakers are connected and it starts driving audio out the two center pogo pins. When this is happening the charging takes place through the dock, the USB connector can be used with a data cable or an OTG device, but no charging takes place through USB when the dock is connected. (An OTG device is still powered by the N7, but current never goes the other way.)
Mechanio said:
There are basically 3 types of cables you can plug into the USB port of a Nexus 7:
1. A normal USB-to-microUSB cable, plugged into a computer or a USB charger. Either way it charges, and if it is hooked to a computer the N7 is in Client Mode and you can transfer files as well.
2. High-current chargers (like the one that comes with the Nexus 7). The data lines on these are shorted together; this tells the Nexus to accept higher current on the power lines for faster charging.
3. OTG cables have the normal 4 wires on the USB end - two for power, two for data - but on the microUSB end there is a fifth connection called USBID. Normally (as when using a normal 4-wire USB cable) the USBID pin is floating, i.e. not hooked to anything. On an OTG cable, the USBID pin is connected to the ground wire. This tells the N7 that an OTG device is plugged in, which causes it to do two things: it reverses the current on the power lines - because it needs to power whatever you have plugged into the OTG cable, like a USB card reader or keyboard - and it switches the USB interface from Client Mode (which it uses when it is plugged into a computer, because in that instance the N7 is a peripheral device) to Host Mode (because in that instance the OTG device is the peripheral and the N7 is the 'computer').
There is one other option for charging: the pogo pins on the side. (The 4 pins are 5V, stereo left, stereo right, and ground.) Providing power to the pogo pins (as when it is put in a dock) tells the N7 to accept high current on the pogo pins. Momentarily connecting 5V to the right stereo channel tells the N7 that external speakers are connected and it starts driving audio out the two center pogo pins. When this is happening the charging takes place through the dock, the USB connector can be used with a data cable or an OTG device, but no charging takes place through USB when the dock is connected. (An OTG device is still powered by the N7, but current never goes the other way.)
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Dont forget a "y cable", which can charge and preform host mode (otg) at the same time, only at a slower charging rate. This is providing you are using a kernel that supports this function. "Otg+host mode charging"
Sent from my Nexus 7 using xda premium
Quick question for you.
I've just ordered a Nexus 6P and will have to change all my chargers at home and at the office.
Of course I'll only use cables purchased at the Google Store or cabler reviewed by Benson Leung.
What about wall chargers? Can I use 3A USB Type A chargers or should I upgrade those as well?
Thanks and sorry for re-posting. I just haven't found antyhing about the bricks. Only the cables.
Fitur said:
What about wall chargers? Can I use 3A USB Type A chargers or should I upgrade those as well?
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A charger with a Type-A socket paired with a spec-compliant Type-A to Type-C cable will be able to provide a max of 2.4A of power. The only way to get more than 2.4A out of a Type-A charger will be to use a non-compliant Type-A to Type-C cable. In reality though, few chargers out there will actually give you 2.4A.
A charger with a Type-C socket and a Type-C to Type-C cable can do the full 3A while following specs.
Ok, but will the use of a compliant (Google) A to C cable and an old 1A-2.4A charger damage either my phone, the carger or the cable?
Fitur said:
Ok, but will the use of a compliant (Google) A to C cable and an old 1A-2.4A charger damage either my phone, the carger or the cable?
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No, it won't. Googles cable is safe to use.
Googles A to C cable is properly designed. If you use a complaint cable (correct 56k ohm resistor) your phone will see it as a legacy charger and pull what the power brick allows it to pull.
Whereas, a non compliant cable (non 56k ohm resistor) will read as a USB 3.1 type C to type C cable to the phone; so it may (will if it's low on power) try and pull 3A out of a cable and power brick that don't support 3 amps.
Akasa Fox said:
No, it won't. Googles cable is safe to use.
Googles A to C cable is properly designed. If you use a complaint cable (correct 56k ohm resistor) your phone will see it as a legacy charger and pull what the power brick allows it to pull.
Whereas, a non compliant cable (non 56k ohm resistor) will read as a USB 3.1 type C to type C cable to the phone; so it may (will if it's low on power) try and pull 3A out of a cable and power brick that don't support 3 amps.
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Thanks. That answers my questions.