Tests on Y-cables

DING Changchang archang at canaan-creative.com
Tue Jan 6 08:58:09 UTC 2015

The length of the first Y-cable: 15cm each branch.
在 2015年01月06日 16:39, DING Changchang 写道:
> Hi, Werner
> I have tested two Y-cables Xiangfu bought:
> http://downloads.qi-hardware.com/people/xiangfu/anelok/y-cable/Y-cable.JPG
> http://downloads.qi-hardware.com/people/xiangfu/anelok/y-cable/Y-cable-with-chip.JPG
> They both have the ID pin connected to GND in USB Micro B port as the 
> OTG host.
> The first one should meet all the needs:
> Works fine when connecting usb keyboard/mouse/disk on the OTG slave 
> (the standard USB A female)
> The power branch does deliver power to both slave and host, only 
> failing in charging a Nexus5. But it can charge a Nexus4 and power up 
> a RaspberryPi.
> One problem is that the power branch has a Micro B female and is not 
> long enough. But we can connect it with a Micro B male to Standard A 
> male cable which is very easy to get:
> http://downloads.qi-hardware.com/people/xiangfu/anelok/y-cable/Y-cable-full.JPG
> The second one has a chip inside.
> It cannot work properly when all three ends are in use.
> Another cable Xiangfu ordered should arrive in a few days. I will test 
> it later.
> CC

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