That USB hub
Jun. 14th, 2011 05:52 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
johnridleyI got that Rosewill 10 port USB hub today, and immediately took it apart. It also didn't have a diode in the USB power circuit, but it didn't have a jumper either. The +5VDC pin on the USB input wasn't connected (though there is a place to install a diode, it wasn't there). I checked the manual and it does not give bus power as an option; this unit is ONLY self-powered.
This is actually a sane option for a 10 port hub. It's ridiculous to use a 10 port hub and try to bus-power it; it's dicey with 4 ports unless you're running only self-powered devices such as scanners and hard drives with their own power supplies.
I went to Radio Shack yesterday to buy a diode for the other 10 port hub and found that they no longer stock Schottky diodes, and a regular rectifier diode won't do in this application. Radio Shack is pretty much a cell phone kiosk and Christmas cheap R/C car outlet these days.
After this though I think it would be just as sensible to just remove the jumper from the other hub as well and use it only in self-powered mode.
This is actually a sane option for a 10 port hub. It's ridiculous to use a 10 port hub and try to bus-power it; it's dicey with 4 ports unless you're running only self-powered devices such as scanners and hard drives with their own power supplies.
I went to Radio Shack yesterday to buy a diode for the other 10 port hub and found that they no longer stock Schottky diodes, and a regular rectifier diode won't do in this application. Radio Shack is pretty much a cell phone kiosk and Christmas cheap R/C car outlet these days.
After this though I think it would be just as sensible to just remove the jumper from the other hub as well and use it only in self-powered mode.
