I need it for an application in which I need to control when power is supplied to the USB hub. If I unplug the adapter, I do not want the hub to draw power from the USB bus and still be working. I want it to switch off.
I found a USB 1.1 hub (Belkin F5U021u) which has a switch to go between self powered mode and bus powered mode. But I need a USB 2.0 hub.
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self powered does not actually power the device, it only suppliments the bus power. Self powered hubs are always better.
My adaptec does not have a switch but you just unhook the power from it and it goes bus powered. be easy enough to wire a switch into the power line.
I found a USB 1.1 hub (Belkin F5U021u) which has a switch to go between self powered mode and bus powered mode. But I need a USB 2.0 hub.