Main.IPhoneCarCharger History
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!!Update
[[http://ladyada.net | ladyada]] provides a slightly different schematic taken from a reverse engineered Apple charger and uses in their awesome [[http://www.adafruit.com/blog/2010/08/03/new-product-mintyboost-3-0-works-with-iphone-4-iphone-3gs-ipod-touch-android-and-more/| Minty Boost kit]]
[[http://ladyada.net | ladyada]] provides a slightly different schematic taken from a reverse engineered Apple charger and uses in their awesome [[http://www.adafruit.com/blog/2010/08/03/new-product-mintyboost-3-0-works-with-iphone-4-iphone-3gs-ipod-touch-android-and-more/| Minty Boost kit]]
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The iPhone (and also some other devices) does not charge when connected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This page documents how you can make your car USB power adapter iPhone compatible.
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The iPhone (and also some other devices) does not charge when connected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone to start charging, it is sufficient to provide about 2.5V at the data lines, which can easily be achieved with a voltage divider consisting of 2 100k Ohm resistors. This page documents how you can make your car USB power adapter iPhone compatible.
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The iPhone (and also some other devices) does charging when connected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This page documents how you can make your car USB power adapter iPhone compatible.
to:
The iPhone (and also some other devices) does not charge when connected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This page documents how you can make your car USB power adapter iPhone compatible.
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The iPhone (and also some other devices) does charging when connected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This page documents how you can modify a car USB power adapter to be iPhone compatible.
to:
The iPhone (and also some other devices) does charging when connected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This page documents how you can make your car USB power adapter iPhone compatible.
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The iPhone (and also some other devices) does charging when conected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This page documents how you can modify a car USB power adapter to be iPhone compatible.
to:
The iPhone (and also some other devices) does charging when connected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This page documents how you can modify a car USB power adapter to be iPhone compatible.
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* Open the car adapter and find the USB connector. The outer pins are VCC and GND. Verify with a multimeter. The middle ones are the data lines.
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* Open the car adapter and find the USB connector. The outer pins are VCC and GND. Verify with a voltmeter. The middle two are the data lines.
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* Connect an 100k Ohm resistor to both GND and VCC and connect them to the data lines, effecitvely building a voltage divider.
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* Connect an 100k Ohm resistor to both GND and VCC and connect them to the data lines, effectively building a voltage divider.
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The iPhone (and also some other devices) does charging when conected to a standard car USB power adapter. These adapter provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This pages documents, how you can modify a car USB power adapter to be iPhone compabtible.
to:
The iPhone (and also some other devices) does charging when conected to a standard car USB power adapter. These adapters provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This page documents how you can modify a car USB power adapter to be iPhone compatible.
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-2.jpg
%center%'''PCB from below, USB connector at the right.'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-2.jpg
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%center%'''PCB from below, USB connector at the right.'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-3.jpg
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%center%'''D+ and D- connected together and to GND and VCC.'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-3.jpg
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%center%'''D+ and D- connected together and to GND and VCC.'''
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* Open the car adapter and find the USB connector. The outer pins are VCC and GND. Verify with a multimeter. The middle ones are the data lines.
* Solder both data lines together.
* Connect an 100k Ohm resistor to both GND and VCC and connect them to the data lines, effecitvely building a voltage divider.
* Done. Put the adapter back together and give it a try.
* Solder both data lines together.
* Connect an 100k Ohm resistor to both GND and VCC and connect them to the data lines, effecitvely building a voltage divider.
* Done. Put the adapter back together and give it a try.
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-2.jpg
%center%'''PCB from below, USB connector at the right.'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-3.jpg
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-2.jpg
%center%'''PCB from below, USB connector at the right.'''
%center%'''PCB from below, USB connector at the right.'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-3.jpg
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-3.jpg
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-1.jpg
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%center%'''Car USB power adapter without cover'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-2.jpg
%center%'''PCB from below, USB connector at the right.'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-3.jpg
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%center%'''D+ and D- connected together and to GND and VCC.'''
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%center%'''Car USB power adapter without cover'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-2.jpg
%center%'''PCB from below, USB connector at the right.'''
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%center% http://electronics.ringwald.ch/img/iPhoneChargerMod-3.jpg
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%center%'''D+ and D- connected together and to GND and VCC.'''
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!!Problem
The iPhone (and also some other devices) doesnot start charging with standard Car USB power adapters. With normal adapters, the GND and VCC are connected but not the two data lines (D+ and D-). However, it is enough to pull the data lines to 2.5V.
The iPhone (and also some other devices) does
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!!Overview
The iPhone (and also some other devices) does charging when conected to a standard car USB power adapter. These adapter provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This pages documents, how you can modify a car USB power adapter to be iPhone compabtible.
!!Instructions
* Open the car adapter and find the USB connector. The outer pins are VCC and GND. Verify with a multimeter. The middle ones are the data lines.
* Solder both data lines together.
* Connect an 100k Ohm resistor to both GND and VCC and connect them to the data lines, effecitvely building a voltage divider.
* Done. Put the adapter back together and give it a try.
The iPhone (and also some other devices) does charging when conected to a standard car USB power adapter. These adapter provide 5V at VCC and GND of the USB port. The data lines (D+ and D-), however, are not connected. For the iPhone, it is sufficient to use pull-up resistors to provide 2.5 V at the data lines. This pages documents, how you can modify a car USB power adapter to be iPhone compabtible.
!!Instructions
* Open the car adapter and find the USB connector. The outer pins are VCC and GND. Verify with a multimeter. The middle ones are the data lines.
* Solder both data lines together.
* Connect an 100k Ohm resistor to both GND and VCC and connect them to the data lines, effecitvely building a voltage divider.
* Done. Put the adapter back together and give it a try.
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Open the car adapter and find the USB connector. The outer pins are VCC and GND. Verify with a multimeter. The middle ones are the data lines. Solder both data lines together. Connect the data lines with two 100k Ohm resistors to both VCC and GND, effectively building a voltage divider. DONE.
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! iPhone Car Charger
!!Problem
The iPhone (and also some other devices) does not start charging with standard Car USB power adapters. With normal adapters, the GND and VCC are connected but not the two data lines (D+ and D-). However, it is enough to pull the data lines to 2.5V.
!!Approach
Open the car adapter and find the USB connector. The outer pins are VCC and GND. Verify with a multimeter. The middle ones are the data lines. Solder both data lines together. Connect the data lines with two 100k Ohm resistors to both VCC and GND, effectively building a voltage divider. DONE.
!!Images
To follow.
!!Problem
The iPhone (and also some other devices) does not start charging with standard Car USB power adapters. With normal adapters, the GND and VCC are connected but not the two data lines (D+ and D-). However, it is enough to pull the data lines to 2.5V.
!!Approach
Open the car adapter and find the USB connector. The outer pins are VCC and GND. Verify with a multimeter. The middle ones are the data lines. Solder both data lines together. Connect the data lines with two 100k Ohm resistors to both VCC and GND, effectively building a voltage divider. DONE.
!!Images
To follow.