Stupid question: remote usb
Guenther Sohler
I think to put 20m cable into my flat(through walls) to achieve this goal.
Will this work reliable with usb20 if i use such amplifier available for
usb ?
Another option would be using zigbee, or wlan ???
Whats the easist solution to achieve my goal ?
rds
kony
<guenthe...@gmx.at> wrote:
Easiest depends on what your goal is, the purpose. If
you're just trying to set up a webcam then get one with
wireless lan support, and of course a wifi acess point or
router with access point functionality.
Guenther Sohler
> On 31 Oct 2007 16:10:12 GMT, Guenther Sohler <guenthe...@gmx.at>
> wrote:
>
>>I want to have some my usb devices in a different place than my
>>computer. I think to put 20m cable into my flat(through walls) to
>>achieve this goal. Will this work reliable with usb20 if i use such
>>amplifier available for usb ?
>>Another option would be using zigbee, or wlan ???
>>
>>Whats the easist solution to achieve my goal ?
>>
>>rds
>
No, my remote usb devices are a lcd display, a usb soundcard and a usb
remote control receiver.
any hints ???
Paul
http://www.usb.org/about/faq/ans5#q5
Q3: How far away from a PC can I put a USB device?
A3: With the maximum of 5 hubs connected with 5m cables and a 5m cable
going to your full speed device, this will give you 30m of cable
(see section 7.1.19 for details). With a low speed device, you will
be able to get a range up to 27m, depending on how long the device's
cable is. With a straightforward cable route, you will probably be
able to reach out 25m or so from the PC.
GWC 16.4 ft. USB 2.0 Repeater Cable Model AR2500- 5M - Retail $11 USD
http://www.newegg.com/Product/Product.aspx?Item=N82E16812224004
COMTOP 16 ft. USB Repeater Cable, AM/AF Model 10U2-24116 - Retail $15 USD
http://www.newegg.com/Product/Product.aspx?Item=N82E16812116123
SABRENT 16.5 ft. USB 2.0 ACTIVE Extension REPEATER Cable AM/ AF Model USB-EXC2 - Retail $10 USD
http://www.newegg.com/Product/Product.aspx?Item=N82E16812156018
The COMTOP one had the best reviews:
http://www.newegg.com/Product/ProductReview.aspx?Item=N82E16812116123
Buy four of the above products, and that will give a total of 20 meters
of cable. With the COMTOP unit, the total project cost is $60 plus shipping.
Note the comment about bus power. You cannot expect much +5V to be available
at the end of the cable! Your USB device at the other end of the 20M cable
must have well less than a 100mA load. Each USB repeater is a bus powered
hub, with a 100mA power limit. Plus, you have the voltage drop in the
long length of cable. Since these products are so low priced, I would
expect them to cheat on the amount of copper used in the cable. As
long as your "lcd display, a usb soundcard and a usb remote control receiver"
have their own power supply, they'll be fine. Alternately, you can
purchase a self powered USB2 hub for the end of the cable, and solve the
USB power problem that way.
In the following diagram, you will need three USB2 repeater cables ($45),
a five meter USB2 passive cable, a USB2 powered hub with A.C. Adapter. The
total number of hubs is four, in this chain, which meets the limit of using
five hubs in a row. The powered USB2 hub gives 500mA maximum, to each output device.
(3)
<---- Repeater ----> A.C. Adapter
Cables |
15Meters <- 5m passive -> |
cable |
PC -----X -----X -----X ---------------- Powered ----- LCD Display
USB2 Hub ---- USB sound
---- USB remote control
Hope that helps,
Paul
Guenther Sohler
I also thought about this option.
Alternatively i thought about a different concept:
How about transmitting the signal over powerline.
There are devices on the market named
"usb ethernet over powerline" but i fear these devices transfer an
ethernet connection over powerline, optionally per usb.
or can they really transfert the usb bus over powerline.
I thought about using a wlan card but does there exist a usb roothub with
an ehternet ip adress ?
so much thinking...
Spajky
wrote:
>>>I want to have some my usb devices in a different place than my
>>>computer. I think to put 20m cable into my flat(through walls) to
>>>achieve this goal. Will this work reliable with usb20 ...
> my remote usb devices are a lcd display, a usb soundcard and a usb
>remote control receiver.
>any hints ???
IMHO for that, it does not need more than 0,5A in total of current &
speed of Usb1.1 should be enough (it is not video data that is
transfered to need real Usb2.0 speed) ... you can make a double 21m
H123 sat coax & powered prolongue of the ordinary 2-3m standard usb
cable cut in half ... like this (powered from PC): someone could made
it for you if you have no soldering practice ...
http://193.189.160.28/seibert/HP/UsbEnh/UsbLongCable.gif
or this (non powered): with than using minimum an old extra powered
Usb1.1 hub at the end to provide power to the attached end hardware &
to split usb data to different edge hardware used ...
http://193.189.160.28/seibert/HP/UsbEnh/UsbLongCable2.gif
may work well ....
That first for example approx.15m long "fast DIY" made with ordinary
TV coax I used it for my active wifi UsbKey antenna experiments :
http://193.189.160.28/seibert/HP/UsbEnh/UsbProlAll.jpg
http://193.189.160.28/seibert/HP/UsbEnh/UsbProlEnds.jpg
it worked till 24m of TL lenght tested for wifi 802.11b Only
(11Mbit/s) (WLAN UsbKey antena away from my PC) ...
--
Regards , SPAJKY ®
mail addr. @ my site @ http://www.spajky.vze.com
5y - "Tualatin OC-ed / BX-Slot1 / inaudible setup!"
Grinder
> Hallo Paul,
>
> I also thought about this option.
> Alternatively i thought about a different concept:
> How about transmitting the signal over powerline.
>
> There are devices on the market named
>
> "usb ethernet over powerline" but i fear these devices transfer an
> ethernet connection over powerline, optionally per usb.
> or can they really transfert the usb bus over powerline.
If you would link to the specific device, I could say it with
confidence, but I suspect your fears are founded. Devices such as this:
http://netgear.com/Products/PowerlineNetworking/PowerlineEthernetAdapters/XE102.aspx
...are a means to extend your home network through your power lines.
Or, at least that's the theory. They don't seem very reliable to me.
> I thought about using a wlan card but does there exist a usb roothub with
> an ehternet ip adress ?
There is this:
http://www.iogear.com/main.php?loc=product&Item=GUCE51
...but it only supports USB1.1. I suppose a gigabit (1000Mbps) network
could keep up with USB2 (480Mbps), but I've not seen such a device.
> so much thinking...
Grinder
>> I thought about using a wlan card but does there exist a usb roothub with
>> an ehternet ip adress ?
Grinder wrote:
> There is this:
> http://www.iogear.com/main.php?loc=product&Item=GUCE51
>
> ...but it only supports USB1.1. I suppose a gigabit (1000Mbps) network
> could keep up with USB2 (480Mbps), but I've not seen such a device.
I should have looked more closely. It appears that this company makes a
number of USB2 extenders:
http://www.startech.com/Product/ItemList.aspx?MLID=7&WCLID=569&WCID=333&c=US