On Mon, 21 Jan 2019 08:48:07 +0100, Ralf Mardorf wrote: >On Sun, 2019-01-20 at 15:35 -0800, Ace Path wrote: >> If you desolder the 5v pin from the usb cable on the usb hub, it will >> no longer be powered by your computers usb port, but can still >> communicate with it (keep the gnd connected!). Then you can either >> solder on a port or a wire(I used a wire since i dont have many micro >> USB ports on hand which I would have preferred, and connect it to a >> power bank. Woila! Rechargeable battery powered usb hub in 5 >> minutes > >Don't try this at home! > >Usually active 4-port USB hubs are inexpensive, too and they usually >could be used as an active or passive USB hub, without the need of a >switch to connect or disconnect +5V aka VCC aka VBUS coming from the >computer. Instead of cutting of the connection from the computer's >power, a diode might do the trick. OTOH a diode, such as a 1N4007 drops >the voltage, which could become an issue. However, your solution with >the cut off power still requires a wall wart with proper regulation, or >you anyway at least need to add a 5.1V Zener diode, since adding a >voltage regulator could be tricky, too. > >In the end DIY is time consuming and is asking for trouble. You >probably won't damage your hardware, but much likely the DIY thingy >won't do the job in all (or at least most) cases. Better buy a cheap >active USB hub that was tested to work in all (or at least most) cases >by a computer magazine, such as the >https://www.reichelt.de/usb-2-0-4-port-hub-with-power-supply-unit-delock-61393-p73906.html?&trstct=pos_0 >. I missed that you are using a battery instead of a wall wart, so voltage regulation doesn't matter. It's still not worth the effort. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
