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| General Electronics Chat Discussion forum for general chat about anything electronics related, including asking questions about material in the All About Circuits E-book, Worksheets, and Videos. |
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#1
03-01-2010, 08:12 AM
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USB to Ethernet Wiring Diagram
Hello, does anyone know or know of a source of a wiring diagram for USB to Ethernet?
You can buy just a cable and I have ordered one, but that will take a while to arrive and it would be useful to know if there is a standard for connecting USB to RJ45.
__________________
The information I provide or post on this website is for educational purposes only. By copying any information posted by me, you agree to the "as is nature of the information". No liability or warranty is given or implied. Working with electrical circuits can be hazardous and is potentially lethal. Proceed at your own risk! 
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#2
03-01-2010, 08:15 AM
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There is no way to do it simple. You need some kind of microprocessor to act as the USB ethernet extension and then convert the data between usb and ethernet, which are two completely different protocols.
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#3
03-01-2010, 08:24 AM
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Hi Kubeek, thanks for the reply. Yes, I do realise that USB and Ethernet are completely different protocols and interface standards. However, there are cables / connector sub-assemblys that allow direct connection of USB to RJ45. See this link ...
USB<>RJ45 What I am currently doing to save space, is using a USB connector to send and receive 100BaseT. I need a connector like this to translate it to a CAT5 cable.
__________________
The information I provide or post on this website is for educational purposes only. By copying any information posted by me, you agree to the "as is nature of the information". No liability or warranty is given or implied. Working with electrical circuits can be hazardous and is potentially lethal. Proceed at your own risk!
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#4
03-02-2010, 06:46 PM
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100baseT should be possible using USB connectors, but the wiring quite depends on you. If you buy that adaptor, I think you need to test which wire goes where to see the wiring. The usb connector doesnīt force you to do it any one way.
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#5
03-03-2010, 12:57 PM
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Yes, I think the USB connector is cable of the data rate, so that is why I chose to use it, being much smaller than the RJ45. However, I do not think I phrased my original question very well at all. What I am trying to find is a wiring diagram of the USB to RJ45 interface connector. However, I shall know soon as I have one on order. Just thought that it might have been standardised and documented somewhere!
__________________
The information I provide or post on this website is for educational purposes only. By copying any information posted by me, you agree to the "as is nature of the information". No liability or warranty is given or implied. Working with electrical circuits can be hazardous and is potentially lethal. Proceed at your own risk!
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#6
03-03-2010, 02:18 PM
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I think the connector is meant to provide USB over cat5 wires, so you could even end up needing some other rewiring to get the right Ethernet signals to the USB connector pins.
Anyway this kind of adaptor is so strange that I donīt think there is any standard way of wiring it up.
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#7
03-11-2010, 05:52 AM
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I have only one question::
Does USB Require a crossover cable (like Ethernet)? .. If not.. Just wire the TX pair on USB to TX pair on RJ-45 and the RX pairs as well... ... Oops.. I mean the TX (+) and RX(+)... I guess you would have to tie the TX (-) and RX (-) to each other, and connect them to the USB ground... ... I buy my USB to RJ-45 Connectors... never give it much tought either... They only cost us like $3.00 each - heck an RJ-45 In-Line connector costs like $6.00 so this is peanuts cost wise.. Dataman19
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