Hello Skooter Blog readers, Today I talk about a Adapter / Charger for iPad Dual USB jack for car with 12 ~ 24V DC (Car Cigarette Powered Dual USB Adapter/Charger for iPad – Black (DC 12 ~ 24V)) acquired on DealExtreme. This charger / adapter was purchased to carry my GPS Navigator 5.0 "LCD, 372 MHz CPU, Windows CE 5.0, Bluetooth, Tranmissor FM and 2GB SD Card with maps, whose original charger broke. Worse, the poor design of the original charger only puts a plastic between phase and earth. This small wall just breaking, placing the charger shorted, causing burning fuse socket of the car. As occurred only short depending on how the charger was plugged, just a fuse burning more before finding the problem. He might even try to repair the original charger, but I thought I'd throw it out and buy a new charger.
The Adapter / Charger for iPad Dual USB jack for car with 12 ~ 24V DC is plugged into the jacks a car and has two USB ports, being a specific one for iPad and other devices. My GPS Navigator 5.0 "LCD, 372 MHz CPU, Windows CE 5.0, Bluetooth, Tranmissor FM and 2GB SD Card with maps works with either of the two ports. So what is the difference between the two ports? Explain: um USB connector 2.0 or less has 4 fios, one phase (V_USB) providing 5V, a ground (GND) and two wires for data transmission (D- and D ). For the USB specification, such doors shall provide a maximum of 500mA of current to devices connected to them. Even when a device will not use the data channel, in other words, will only use power from USB port, it should still make a data communication to tell the computer or device which is connected that is connecting and it will use energy port (até 500mA), and the computer will have the option of saying “Go ahead” or “Do not do it”. But in practice, most devices only pulls energy without informing anything for data channel. Likewise, Chargers general also not connect anything to pins data, offering only 500mA current (or more in the case of fast chargers) Through two pines energy.
As we know, Apple is famous for selling anything trivial the price of gold, then of course they would take steps to ensure that their iPods, iPhones and iPads did not work with any charger Chinese $2 U.S. dollar, forcing consumers to buy their products original accessories that are extremely expensive for what they do. A Lady Ada did reverse engineering Apple's boots and found that they utilize the data wires in a non-trivial. Basically, what they do is use some resistors for the D line provides a voltage of 2.0 V and D line- provides a voltage of 2.8 V or 2.0 V, depending on whether a quick charger (1A) or lento (500mA), respectively. Desta form, an Apple product is able to know whether you are connected to a charger or not official. Furthermore, by indicating a 2.8 V or 2.0 V also knows he can do a quick charge using the USB port to 1A, or whether it should be limited to 500mA.
With these data in hand, our Chinese comrades can make adapters that Apple devices can not identify as unofficial. In that Adapter / Charger for iPad Dual USB jack for car with 12 ~ 24V DC the top door is designed for the iPad, in other words, she deceives Apple devices making them think they are connected to a charger official, and also allows them to use larger currents. A door inferior, used by “other” devices, probably offers nothing in the D and D-, but it gave me the job of making measurements, then I can not guarantee. Note that in the photos on the website of DealExtreme There is an indication that the USB port iPad stand up to 2.1 A and the USB port for other devices stand up to 1A. The Carregador / Dual USB Adapter I received no such indications for port, the only indication that receives as input 12 ~ 24V DC and provides as output 5V DC up to 2.1 A, which would imply that the two doors together can consume up to 2.1 A together.
But, in short, Who has iPad or other Apple devices should use the upper door Carregador / Dual USB Adapter to have a faster recharging (or even to have any reloading, I do not know if it is configured as the lower door and how she deals with Apple devices). And those, I like, that has nothing Apple, can completely ignore all that and use any one of the two USB ports to recharge your devices. As I said, my GPS Navigator 5.0 "LCD, 372 MHz CPU, Windows CE 5.0, Bluetooth, Tranmissor FM and 2GB SD Card with maps seems not to care about whatever it is that is in the data wires, and do not even know if it is limited to 500mA or get beyond, just picked this Carregador / Dual USB Adapter to have a different take from that and broke, therefore, more likely to have a different design than broke and possibly better prepared. A blue LED illuminates when the charger is plugged in car (USB ports regardless of whether they are connected), which is quite useful because depending on the model can take it accidentally disconnect with the movement of the vehicle is not properly seated, and that pass unnoticed, except for the indication of the device itself being loaded, that is not always as visible.
As a buy, was made on 01/03/2011 and posted on 05/03. Arrived the day 20/04, a month and a half later. The description of the package came as "POWER SUPPLY", with the declared weight 22 programs and declared value of $3,90 USD (U.S. dollars two), real value of the product. The package was not taxed.
And I'm ending here the article on Adapter / Charger for iPad Dual USB jack for car with 12 ~ 24V DC (Car Cigarette Powered Dual USB Adapter/Charger for iPad – Black (DC 12 ~ 24V)). If you also want to shop in DealExtreme, directly from Hong Kong, click here and good shopping.