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RE: Extending USB Connections
- To: <ukha_d@xxxxxxx>
- Subject: RE: Extending USB Connections
- From: "Keith Doxey" <ukha@xxxxxxx>
- Date: Thu, 6 Dec 2001 12:13:53 -0000
- Delivered-to: mailing list ukha_d@xxxxxxx
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- Reply-to: ukha_d@xxxxxxx
It was
Mark who suggested KUT5 :-)
I
will
stick to the AV stuff for now. Let us know how you get on with modifying
cables.
Like I said, I dont have any USB kit to experiment with
anyway.
Keith
Just
found this
Looks like someone have beaten you to making KUT5
:-)
I'll
try messing around with some USB cabling at some point over
Christmas.
Cheers
Dan
Instead of spending more money on a camera, why not buy a couple of
USB connectors and make a lead.
PC
USB_Plug (A&B) RJ45 ---------CAT5---------RJ45(A&B + Local 5V
input)USB_Socket <Webcam
Keith
PS. Dont blame me if it doesnt work !
Umm.. thanks for this Keith
I might look at buying a cheap (£20) camera and
pulling it to bits then..
Dan
I would be tempted to try USB over a longer
distance.
I believe the main limitation is in the pair of wires feeding the
power. USB has 4 wires +5v, 0v, A & B. A and B are the data pair, as
long as you used a local power supply at the distant end it might work
OK. As I understand it, the actual DATA is carried as a balanced RS485
type signal so should be good for quite a long distance over
CAT5.
Of course, I could be talking B******* as I have never played
with USB.
I cant test this theory as I dont own any USB
kit.
Keith
Excuse the blonde question :-)
but why is their such a limitation on the
length of cable for USB? - do they use very low voltages for their
signalling, and as such this would deteriorate over any distance - say
15 metres?
<Whinge mode>
It just seems such a waste, that I can buy a
reasonable colour web cam for under £50 and I could then have more
than one connected to my pc, that they would all have to be within a
few metres of node Zero!!
</Whinge mode>
Daniel (throwing his toys
out of the box!!)
> Erm,
I didn't think that was what USB / Ethernet adaptors
did!
Most don't , but I'm sure there's some that do ...
somewhere ...
> They're there to give a PC a network
connection using a USB port rather
> than a PCI or an ISA
one.
>
> In order to extend the camera, Dan would need
the CAMERA to be able to
> load the device drivers for the USB
network card, if you see what I
> mean.
yeah,
gotcha.
> Am I wrong here? Are there, in fact, USB
extenders that work over
> Ethernet???
I'm sure I've
seen them around, but I've no idea where. Perhaps
someone
else has?
Andy
--
PC-Based Multimedia System
- now working!
http://www.andylaurence.pwp.blueyonder.co.uk/pcbmms
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