Hi,
do you know whether it is possible to supply power to PCMCIA USB power jack from other USB port?
My situation: I have ThinkPad T30, it has 2 USB 1.1 ports. I wanted to upgrade to USB 2.0 so I bought two-port ST-LAB PCMCIA USB 2.0 CardBus. The only problem I have is that the PCMCIA's ports can supply only 300mA which is not enough for my USB flash drive. But this drive works when I plug it into one of the USB 1.1 ports directly on my laptop. PCMCIA has a power jack on it which can be used to supply additional power to its USB ports. According to specification I should plug in 5V/1A to get 500mA on every USB port which should be the same as regular USB ports have. I was wondering whether I could supply this power from my USB 1.1 port? I know I would get only 500mA to PCMCIA so maybe it won't work anyway, but I would try it, because it would be much better than to use external power supply. But I don't know if it is safe to take power from USB port on notebook and plug it into PCMCIA card which is connected to this notebook...
Other question is the cabel I should use. I think this kind of cable is used with same external hard drive boxes for 2.5" drives, like Akasa 2.5" box.
Any ideas, opinions?
Thanx for any help,
David
do you know whether it is possible to supply power to PCMCIA USB power jack from other USB port?
My situation: I have ThinkPad T30, it has 2 USB 1.1 ports. I wanted to upgrade to USB 2.0 so I bought two-port ST-LAB PCMCIA USB 2.0 CardBus. The only problem I have is that the PCMCIA's ports can supply only 300mA which is not enough for my USB flash drive. But this drive works when I plug it into one of the USB 1.1 ports directly on my laptop. PCMCIA has a power jack on it which can be used to supply additional power to its USB ports. According to specification I should plug in 5V/1A to get 500mA on every USB port which should be the same as regular USB ports have. I was wondering whether I could supply this power from my USB 1.1 port? I know I would get only 500mA to PCMCIA so maybe it won't work anyway, but I would try it, because it would be much better than to use external power supply. But I don't know if it is safe to take power from USB port on notebook and plug it into PCMCIA card which is connected to this notebook...
Other question is the cabel I should use. I think this kind of cable is used with same external hard drive boxes for 2.5" drives, like Akasa 2.5" box.
Any ideas, opinions?
Thanx for any help,
David
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