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> Battery Powered Usb Hub?, do they exist?
xamindar
post Sep 6 2008, 08:50 PM
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I have a usb device that requires more power when pluged into the zaurus. I still need to be mobile so I'm wondering if there are any goot battery powered usb hubs out there that will add the extra power needed to allow powered usb devices to work? Does anyone know of any?
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laan
post Sep 7 2008, 03:05 AM
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http://eu.cyberpowersystems.com/product/hub_h420mp.htm not one of the wonders of the world but relatively easy to find in ebay and works
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utx
post Sep 7 2008, 11:43 AM
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If you are hardware hacker, you may modify your Zaurus to support 500mA (for 2.6 kernels you also need to increase kernel power budget from 180 to 500). It's just one resistor replacement: www.iral.com/~albertr/linux/zaurus/wireless/
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xamindar
post Sep 27 2008, 04:08 PM
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QUOTE(laan @ Sep 7 2008, 04:05 AM) *
http://eu.cyberpowersystems.com/product/hub_h420mp.htm not one of the wonders of the world but relatively easy to find in ebay and works


I ended up getting this one and it works great! Seemed to be the only battery powered one out there.
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timonoko
post Oct 24 2008, 01:06 AM
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QUOTE(xamindar @ Sep 6 2008, 08:50 PM) *
I have a usb device that requires more power when pluged into the zaurus. I still need to be mobile so I'm wondering if there are any goot battery powered usb hubs out there that will add the extra power needed to allow powered usb devices to work? Does anyone know of any?

All you need is 5 Volts (max) connected to the USB power pin. This lthiuem-battery produces 4 volts and it seems to be
sufficient to power most power-hungry devices I have.
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xamindar
post Oct 24 2008, 02:57 AM
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Nice laugh.gif blink.gif unsure.gif
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speculatrix
post Oct 26 2008, 02:56 PM
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QUOTE(timonoko @ Oct 24 2008, 09:06 AM) *
This lthiuem-battery produces 4 volts and it seems to be
sufficient to power most power-hungry devices I have.


interesting... how do you charge up that battery?
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timonoko
post Oct 26 2008, 10:48 PM
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interesting... how do you charge up that battery?

-- It is of course removable. It is one of my camera batteries. I have chargers, also a solar charger for that.
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timonoko
post Oct 26 2008, 11:13 PM
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Simple design:
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