Stupid question: remote usb

  • Thread starter Thread starter Guenther Sohler
  • Start date Start date
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Guenther Sohler

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
 
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
Click to expand...


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.
 
No, my remote usb devices are a lcd display, a usb soundcard and a usb
remote control receiver.


any hints ???
 
Guenther said:
No, my remote usb devices are a lcd display, a usb soundcard and a usb
remote control receiver.


any hints ???
Click to expand...


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
 
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.

I thought about using a wlan card but does there exist a usb roothub with
an ehternet ip adress ?

so much thinking...
 
my remote usb devices are a lcd display, a usb soundcard and a usb
remote control receiver.
any hints ???
Click to expand...

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) ...
 
Guenther said:
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.
Click to expand...

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 ?
Click to expand...

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.
 
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