OESF Portables Forum

Everything Else => General Support and Discussion => Zaurus General Forums => Archived Forums => Accessories => Topic started by: xamindar on September 07, 2008, 12:50:33 am

Title: Battery Powered Usb Hub?
Post by: xamindar on September 07, 2008, 12:50:33 am

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?

Title: Battery Powered Usb Hub?
Post by: laan on September 07, 2008, 07:05:34 am

http://eu.cyberpowersystems.com/product/hub_h420mp.htm (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

Title: Battery Powered Usb Hub?
Post by: utx on September 07, 2008, 03:43:22 pm

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/ (http://www.penguin.cz/~utx/zaurus/www.iral.com/~albertr/linux/zaurus/wireless/)

Title: Battery Powered Usb Hub?
Post by: xamindar on September 27, 2008, 08:08:53 pm

Quote from: laan

http://eu.cyberpowersystems.com/product/hub_h420mp.htm (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.

Title: Battery Powered Usb Hub?
Post by: timonoko on October 24, 2008, 05:06:04 am

Quote from: xamindar

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.
[img]http://koti.welho.com/tnoko/jemma/HuaweiModem.JPG\" border=\"0\" class=\"linked-image\" /]

Title: Battery Powered Usb Hub?
Post by: xamindar on October 24, 2008, 06:57:29 am

Nice  

Title: Battery Powered Usb Hub?
Post by: speculatrix on October 26, 2008, 06:56:11 pm

Quote from: timonoko

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?

Title: Battery Powered Usb Hub?
Post by: timonoko on October 27, 2008, 02:48:17 am

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.

Title: Battery Powered Usb Hub?
Post by: timonoko on October 27, 2008, 03:13:36 am

Simple design:
[img]http://koti.welho.com/tnoko/jemma/ZaurusPeriphalia.JPG\" border=\"0\" class=\"linked-image\" /]