2.0双排针插座
itisfrustratingtohaveolderhardwarejustsittingaroundcollectingdustorgettingintheway，soifitcanberepurposedandmadeusefulonceagagagagay thenitisacauseforjoy.today’ssuperuserqapostdiscussesthepossibilitiesofrepurpay
只能把旧硬件像灰尘一样排列，或者打扰，这很令人沮丧。 因此，如果能再利用并再次有用的话，我会很高兴。 今日的超级用户问答& Amp； A帖子讨论了为好奇的读者重用旧的USB 1.1集线器设备的可能性。
today’squestionanswersessioncomestouscourtesyofsuperuser-asubdivisionofstackexchange，a community-drivengroupingofqawebschange
今天的“问答Q&； a”专柜由SuperUser提供。 这是堆栈交换的分支，由社区驱动的问答； a网站已分组。
photocourtesyofalexandroskostalas (Flickr )。
照片由AlexandrosKostalas(Flickr )提供。
问题superuserreaderuser 1049697 wantstoknowifitispossibletouseanoldusb 1.1 hubtochargehisdevices 3360
SuperUser读取器user1049697想知道设备是否可以使用旧的USB 1.1集线器充电。
ihaveanoldusb 1.1 hubandiwaswonderingifitcouldberepurposedforsomethinguseful.woulditbepossibletoconnectittoawallchargerthat hashat dousbhubsnotworkwellwhenconnectedtowalloutlets？
我有一个旧的USB 1.1集线器。 我想知道那个能不能再利用到有用的东西上。 是否可以连接到内置USB插座的壁式充电器，并使用集线器获取四个USB充电端口？ 墙上连接电源插座时，USB集线器不能正常工作吗？
theimagebelowshowsahubsimilartotheusb 1.1 hubi have :
下图显示了一个类似于我拥有的USB 1.1集线器的集线器。
3358 www.Sina.com/ididtrythiswithsomedevicesandtheresultsareasfollows 3360
(Update)我确实在一些设备上尝试了此操作，结果如下：
myoldandroid 2.3 devicewillcharge，albeit very slowly .我的旧Android2.3设备即使很慢也会充电。 My iPhone 5S will not charge at all。
我的iPhone 5S完全不能充电。
isitpossibletouseanoldusb 1.1 hubtochargedevices？
是否可以使用旧的USB 1.1集线器为设备充电？
答案superusercontributorbobhastheanswerforus :
超级用户贡献者Bob为我们提供了答案：
统一管理，itreallydependsonthespecificsoftheimplementationofboththehubandthedevice。
不幸的是，这实际上取决于集线器和设备的实现细节。
thevastmajorityofsimplehubsdonotreallyimplementanysortofpower
control. They will just connect the USB power lines directly to either their host or an external (regulated) power supply, which means you would effectively be sharing the capacity of the power source over all ports.绝大多数简单的集线器实际上并没有实现任何类型的电源控制。 他们将USB电源线直接直接连接到其主机或外部(稳压)电源，这意味着您将有效地共享所有端口上的电源容量。
In practice, however, USB charging gets quite complex. The bottom line is that your USB 1.1 hub will probably charge your peripherals, but at a reduced rate. This is not because the hub is actively limiting the current output, but because peripherals will limit the current they draw unless they can positively confirm the host is capable of supplying that current (to prevent damage to hosts that cannot).
但是实际上，USB充电变得相当复杂。 最重要的是，您的USB 1.1集线器可能会为外围设备充电，但速率会降低。 这不是因为集线器正在积极限制电流输出，而是因为外围设备将限制它们汲取的电流，除非它们可以肯定地确认主机能够提供该电流(以防止损坏不能的主机)。
This reduced rate depends on the specific peripheral and the specific hub, but it likely ranges from 100 mA to 500 mA, which is far less than a modern smart phone’s maximum (over 1,000 mA).
降低的速率取决于特定的外围设备和特定的集线器，但可能在100 mA至500 mA的范围内，这远远低于现代智能手机的最大值(超过1,000 mA)。
To elaborate:
详细说明：
1. If the host implements some kind of power control, then the peripheral must initiate a data connection and negotiate properly. Even though this is technically required by the specs (except the newer battery charging specs), some peripherals might not do so. I imagine most smart phones will at least try, but there are many ‘dumb’ USB peripherals that will not.
1.如果主机执行某种电源控制，则外围设备必须启动数据连接并正确协商。 即使规格在技术上要求这样做(较新的电池充电规格除外)，某些外围设备也可能不需要。 我想大多数智能手机至少会尝试，但是有很多“笨拙”的USB外设却不会。
2. In the case of a hub connected to a USB power supply without a proper host, it might not work at all.
2.如果在没有适当主机的情况下将集线器连接到USB电源，则它可能根本无法工作。
3. Negotiation is as follows:
3.谈判如下：
Each peripheral is permitted to draw one unit load without negotiation. Each peripheral should communicate with the host to request more units.允许每个外设在不协商的情况下提取一个单位负载。 每个外围设备都应与主机通信以请求更多单元。 USB 1.1 and 2.0 define one unit load as 100 mA, with a maximum of 5 unit loads (500 mA).
USB 1.1和2.0将1个单位负载定义为100 mA，最多5个单位负载(500 mA)。 USB 3.0 defines one unit load as 150 mA, with a maximum of 6 unit loads (900 mA).
USB 3.0将1个单位负载定义为150 mA，最多6个单位负载(900 mA)。
4. Modern devices often need more power (smart phones often draw 1,000 mA – 2,000 mA).
4.现代设备通常需要更多的功率(智能手机通常需要1,000 mA – 2,000 mA)。
5. There is a battery charging specification that deals with this. Read through the article “How USB Charges Just About Any Electronic Device” for details on how its negotiation and detection works, but that is not too important.
5.有一个与此有关的电池充电规范。 通读文章“ USB如何为几乎任何电子设备充电 ”以获取有关其协商和检测如何工作的详细信息，但这并不是太重要。
The charging limit is 1,500 mA, but only if the data lines are shorted together (or respond as if they have been). This is not the case with a data-capable host like a USB hub. There is an additional profile that deals with this, but a USB 1.1 hub probably does not implement it.充电极限为1,500 mA，但仅当数据线短接在一起(或已响应时才响应)时。 对于具有数据功能的主机(如USB集线器)而言，情况并非如此。 有一个与此相关的其他配置文件，但是USB 1.1集线器可能没有实现。 With a non-compatible host, most smarter peripherals will fail to detect a high-capacity source and will therefore fall back to charging at 500 mA at most. This means your USB hub will likely charge the device at a significantly slower rate than plugging the peripheral directly into the charger.
使用不兼容的主机，大多数更智能的外围设备将无法检测到大容量电源，因此最多只能恢复到500 mA充电。 这意味着您的USB集线器可能会以比将外围设备直接插入充电器的速度慢得多的速率为设备充电。
5. There are some other specs such as Apple’s protocol, Qualcomm’s quick charge protocol, etc. They all have their own detection and negotiation methods. They will also not work with a USB 1.1 hub.
5.还有其他一些规范，例如Apple的协议，高通的快速充电协议等。它们都有自己的检测和协商方法。 它们也不适用于USB 1.1集线器。
6. There is a newer USB Power Delivery spec, but almost nothing implements it yet and it deals with all sorts of wacky things like different voltages.
6.有一个更新的USB Power Delivery规范，但是几乎没有实现它，它处理各种古怪的事情，例如不同的电压。
Have something to add to the explanation? Sound off in the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.
有什么补充说明吗？ 在评论中听起来不错。 是否想从其他精通Stack Exchange的用户那里获得更多答案？ 在此处查看完整的讨论线程 。
翻译自: https://www.howtogeek.com/219151/can-you-connect-usb-1.1-hubs-to-a-wall-outlet-and-charge-devices/
2.0双排针插座