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RE: Extending USB Connections
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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