iphone charger and synchronize

[elektronik]

Heyyyy
I have made a small charger for iphones and other phones, but I have a problem with letting them synchronize with the pc.
the charger takes currents from the usb of my pc. The question is how to make the iphone for example synchronizing with the pc while charging?​

 

[(*steve*)]

You connect up the USB data pins and you load iTunes.

 

[BobK]

Heyyyy
I have made a small charger for iphones and other phones, but I have a problem with letting them synchronize with the pc.
the charger takes currents from the usb of my pc. The question is how to make the iphone for example synchronizing with the pc while charging?​

In other words, you have made a cable, which most people have 20 of scattered around the house by now, except you left off the data lines.

Bob

 

[elektronik]

What I did is, I connected D+ and D- to some resistors to get the 2,7 volts on these pins, else the iphone 4s won´t charge!!

I also want to connect SD card to it therfore Im asking how to still use data pins to transfer data between the pc and iphone.

 

[elektronik]

You connect up the USB data pins and you load iTunes.

in which way???
First I need to get 2,7 V or something like that on the two data pins.

 

[(*steve*)]

in which way???
First I need to get 2,7 V or something like that on the two data pins.

You only need that if it's not hooked up to a computer.

If it is, it will talk to the computer and draw up to 500mA.

I would be pretty certain you can't get it to draw more than 500mA *AND* talk to the computer.

 

[elektronik]

SO you mean, I just connect it as usual?
I tried that, the iphone doesnt charge!
Only when I apply the 2 volts and still connect it to the pc.
Imagine it like a normal iphone cable but there is a LED and sd card connected to the wire while the lightning goes to the iphone.

Schematic will look like:

pin 1) 5+
pin 2) D+ = 2V
pin 3) D- = 2 V
pin 4) GND

 

[Harald Kapp]

How do you connect an SD card to a USB cable?
What do you mean by "lightning goes to the iphone"? In which way is the LED related to charging the iPhone?

 

[elektronik]

by mounting a micro usb sd card holder to the usb comming from the pc. So I have a female micro usb which is used for the Micro SD.

lightning connector for the iphone will be connected to iphone as normal.
The LED should light when the charger connects to the usb of the pc.

Sorry for the bad english, its may be me who writes in terrible way

 

[davenn]

lightning connector ??? never heard of it

still have no idea what you are talking about

Dave

 

[elektronik]

http://en.wikipedia.org/wiki/Lightning_(connector)

or just http://en.wikipedia.org/wiki/Dock_connector

 

[Harald Kapp]

You cannot connect two devices to one USB port. The SD card reader has to use a different port than the iPhone.

 

[elektronik]

You cannot connect two devices to one USB port. The SD card reader has to use a different port than the iPhone.

Is there any way to do it so??

 

[davenn]

you would need a USB hub

 

[elektronik]

you would need a USB hub

Or a switch to choose between them?

 

[davenn]

yes so the computer only saw either the iPhone or the SD card
but with a hub you could have them both connected at the same time


Dave

 

[elektronik]

yes so the computer only saw either the iPhone or the SD card
but with a hub you could have them both connected at the same time


Dave

How small can the hub be?
Becasue I will not carry a 1/2 kg thing with me

 

[davenn]

google USB hub

PLEASE do so investigating for yourself
these things are very common and easy to buy

 

[Harald Kapp]

Or use two USB ports of your computer - it surely has more than one, does it?

 

[elektronik]

Or use two USB ports of your computer - it surely has more than one, does it?

It has, but when ever you think to make a small component, it has to be a little multitasking.
Best idea now to make a switch.

Thank you guys