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titan is offline titan
2010-01-23 , 11:04
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#11
Originally Posted by Bec View Post
That's true, but if they made such a gadget they would have the upper hand over let's say other "mobile" charger manufacturers like Energizer for example that provide one charger for multiple devices - especially because this would bring USB OTG for Symbian as well (provided they offer an app for that)
nice picture, but don't underestimate the problem:
it would require a chipset which runs Linux 2.6 and is fast enough
to handle the transfer speeds. This would be a non-trivial engineering effort.
The chargers and batteries, however, are low-tech, low-cost, disposable devices assembled in China.
It would be better to keep the USB/IP hub as a separate device which could
be connected to any USB micro power source.
 
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Bec is offline Bec
2010-01-23 , 11:24
Posts: 876 | Thanked: 396 times | Joined on Dec 2009
#12
But wouldn't you like to have the USB/IP portable? I know that the device pictured is too small to be accurate.

I was thinking about some sort of wireless self-powered usb hub that would allow charging too if that would be needed.
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titan is offline titan
2010-01-23 , 11:37
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#13
yes, it should not be larger than the N900 itself and should have it's own
battery. Input voltage range should be such that you can connect both
LiPoly and normal AA cells.

you mean wireless charging? that would be nice (Tesla would love it).

I think a wired connection to the N900 should be default
(as if the the hub was a desktop computer) and wireless could be optional
(it's probably too slow).

Originally Posted by Bec View Post
But wouldn't you like to have the USB/IP portable? I know that the device pictured is too small to be accurate.
I was thinking about some sort of wireless self-powered usb hub that would allow charging too if that would be needed.
 
Farooq is offline Farooq
2010-01-23 , 11:37
Posts: 116 | Thanked: 9 times | Joined on Dec 2009
#14
What i am thinking is that the device should have atleast 2 USB ports, 1 Ethernet port, chargeable as well, builtin wifi transmitter which will ofcourse transmit USB data as well as internet (received through ethernet). The size could be like as normal wireless router available in the market. Usb port should also be able to charge N900. The batery life of the devicse should be atlease 3 to 4 hours.
Is it possible :-)
 
titan is offline titan
2010-01-23 , 11:49
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#15
Originally Posted by Farooq View Post
What i am thinking is that the device should have atleast 2 USB ports, 1 Ethernet port, chargeable as well, builtin wifi transmitter which will ofcourse transmit USB data as well as internet (received through ethernet). The size could be like as normal wireless router available in the market. Usb port should also be able to charge N900. The batery life of the devicse should be atlease 3 to 4 hours.
Is it possible :-)
if you can afford it (shipping is about $50 to EU
http://www.gumstix.com/store/catalog...roducts_id=226
http://www.gumstix.com/store/catalog...roducts_id=230
would even give you DVI output.
now you only need to provide 5V input, e.g. http://gizmodo.com/gadgets/gadgets/m...ger-177527.php
 
Farooq is offline Farooq
2010-01-23 , 11:55
Posts: 116 | Thanked: 9 times | Joined on Dec 2009
#16
Originally Posted by titan View Post
if you can afford it (shipping is about $50 to EU
http://www.gumstix.com/store/catalog...roducts_id=226
http://www.gumstix.com/store/catalog...roducts_id=230
would even give you DVI output.
now you only need to provide 5V input, e.g. http://gizmodo.com/gadgets/gadgets/m...ger-177527.php
are the first 2 devices compatible with N900?
 
titan is offline titan
2010-01-23 , 12:09
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#17
Originally Posted by Farooq View Post
are the first 2 devices compatible with N900?
not without some hacking.
you would have to install a Linux kernel with USB/IP enabled on the flash mem.
(it's almost the same chipset as on the N900 - so could even port Maemo to it)

for power supply you could also try
http://www.eneloop.info/products/mobile-boosters.html
 

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Bec is offline Bec
2010-01-23 , 12:10
Posts: 876 | Thanked: 396 times | Joined on Dec 2009
#18
Originally Posted by titan View Post
I think a wired connection to the N900 should be default
(as if the the hub was a desktop computer) and wireless could be optional
(it's probably too slow).
Don't know why I got stuck at the idea that USB/IP *has* to be done over wifi.

If it works by pluging it in directly we should keep it simple and small IMHO.

Once we have a working full-size "female" USB port all imaginable adapters and converters could be plugged in.

Originally Posted by Farooq View Post
are the first 2 devices compatible with N900?
Provided you know how to mess around with the N900 kernel and wire those two boards together and to a decent Li-Po power source + charging circuits, the rest would be a piece of cake.
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Farooq is offline Farooq
2010-01-23 , 16:17
Posts: 116 | Thanked: 9 times | Joined on Dec 2009
#19
Originally Posted by titan View Post
if you can afford it (shipping is about $50 to EU
http://www.gumstix.com/store/catalog...roducts_id=226
http://www.gumstix.com/store/catalog...roducts_id=230
would even give you DVI output.
now you only need to provide 5V input, e.g. http://gizmodo.com/gadgets/gadgets/m...ger-177527.php
is there any chance that these devices be available in an assembled form for N900 in the future?
 
titan is offline titan
2010-01-23 , 16:23
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#20
Originally Posted by Farooq View Post
is there any chance that these devices be available in an assembled form for N900 in the future?
step by step - first we need to verify that USB/IP can work in the N900 kernel
and that the speed over USBnet or wifi is sufficiently fast.
Then it will be a DIY solution until someone is willing to mass produce it.
 
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