Picture of How to Extend yout USB using UTP
This is my second Instructables. This time, I'm gonna tell everyone how to extend your USB using UTP. Why do you need to do so? Because the USB extender in shops only around 1,5 meters. It's very short, if you need 50 meters for a USB WiFi antenna on your roof. So I share to you people this technique.

P.S.: I will be making the Instructables of the Indonesia's style of USB WiFi antenna. The picture is below.
Remove these adsRemove these ads by Signing Up

Step 1: Gather your parts

Picture of Gather your parts
You need:
(1)USB Cable
(2)UTP Cable
(3)Small PVC Pipe
(4)Rubber tape
(5)thermofit / heatshrink

Step 2: The making of Part 1

Picture of The making of Part 1
Open the UTP and USB cable. Put the small PVC pipe in the UTP cable. Put the thermofit in the USB cable. Then connect it like this:

white orange & orange to red,
white & green to white,
green to green,
and the rest to black.

Remeber to solder it.

Step 3: The making of Part 2

Picture of The making of Part 2
Fit the pipe in the connections and close it with rubber tape. You're finished! Try it. If USB is not detected, then change the USB 1.1 to USB 2.0.

If it doesn't work, try the circuit below.
1-40 of 93Next »
jomac_uk2 months ago

There is a lack of research here, and a lot of misunderstanding about cables, ie twisted pair or shielded etc.

To put the record straight, its nothing do do with either of the above, you can have the best cable in the world, even fancy gold plated low resistance stuff, and the chances of getting any appreciable RELIABLE extra distance above the 5 metre limit is virtually zero.

The reason for this is not interference, nor is it voltage drop, but the timing of the signals that USB uses. Two of the cores are for power, +ve and Ground (red and black) the other two, green and white are clock and data (signal). The clock is a chain of pulses thats used to synchronise the data between the device and the PC, the data, well its just that. What happens when you extend a USB cable is to add a delay in the signals, for example, when a USB sevice wants to send data to the PC, it will do so on the start of the clock pulse, and any data it then sends is kept in step with the clock. As you increase the length of the cable, you increase this delay, to such a point where the data ends up completely out of step and meaningless to the other end.

There are other factors, but thats the reason in a nutshell.

can I use two lines to power a USB hub on the side of the female USB port ?
Sure, just add a capacitor across the power lines at the far end to smooth out power fluctuations.
lamelia1 year ago
Great uses of USB extender, KVMSwitchTech provides various kinds of USB extender products. To know more details visit
lamelia1 year ago
Great uses of USB extender, KVMSwitchTech provides various kinds of USB extender products. To know more details visit
rock2death1 year ago
Does 10 - 15 meters would work on a laptop?
what does that cirucuit above illustrate ?
niraj997992 years ago
I have a usb wabcame and i want to put in my office.. bt i want extend usb 25 meters so wat can i do?
Your best bet is to use a wireless Webcam. If you want to extend USB cables you'll need a repeater (or a USB hub every 5 meters) to do this properly. The USB2 specification is very clear about this. You may get ' lucky ' making a cable. But, the cost of making a cable (using quality copper cable) , and a few repeaters, and your time depugging problems will be more than an inexpensive wireless camera. Good Luck.
wcr_madmax2 years ago
The correct colors for any CAT 5 or CAT 6 cable are

1. slate-orange
2. orange
3. slate-blue
4. blue
5. slate-green
6. green
7. slate-brown
8. brown
I'm using a CAT 5e cable as well... so what color combination should I use to connect this to the usb cabling?
ftube2 years ago
hi first thanks for the great work.

i tried that and its showing USD not recognized pls tell me how to solve this issues?

i am using windows 7 os
mlapid2 years ago
I made 7meters extension and it works fine. But it randomly disconnect my wifi usb adapter. Can someone help me?
bebub122 years ago
why does it tell me that my usb device is unrecognized when i plug the device into the usb cable?
i got that same thing in windows 7, whats going on is that it doesn't have enough power, So what i did is set my motherboard to USB 1.1 in the BIOS and it work fine. But i works fine in linux with out setting all usb to 1.1.

In windows 7 if u dont want to do the USB 1.1 thing u can get it to work with some of the back ports of the PC try each one and try like a pen drive and the WiFi dongle then again i should say " may get it to work "

right now am looking to implement the following to try and solve my problem , , o yea and this to
mmariappan3 years ago
thanks its superb!!!!!!!!!!!!!!!!!!!!!!!!
works nicely

I am from tamilnadu, india
j21a2t895 years ago
Just a quick point you could use a usb hub (with all the plastic stripped off) to regenerate the signal. So using the utp as well you could extend the cable theorectically to any length. You would need to remove the power socket on the hub and have a powerful enough 5v source. hmm i should create an instructable.
This is correct although you would need a USB hub every fifteen feet or so.
i was tried using 15meter utp cable.but not works coz the power is drop down.
15 Meters is WAY too long.
zeefar5 years ago
When I connect the flash drive to the connector through the set up of USB over UTP to PC, the computer does not read the data from my flash drive device, why is that?
Most USB devices won't work with an extension that long without the aid of a USB powered hub. They use 5V provided by the computer, and the voltage drop over more than about 20 feet is enough to create a "USB device not recognized" by the PC. I Use webcams for security on my home, and have to use a powered hub or it won't pick the cams up. Try it.
 what if you use a USB "y" cable? that draws power from 2 ports, therefore doubling the power... am i correct on this?
No. Drawing power from two ports won't affect it. It will probably fry the USB device however. And even if it was plugged into two different ports on the computer it would only be able to transfer data from one.
It isn't the voltage that is affecting it. If the cable isn't shielded the interference could affect it or the data stream isn't powerful enough. It isn't voltage.
Your cord must be too long then
Hi there. I already made up a 10M USB 2.0 cable and I thick I remember it works ok from the computer with a webcam. But I want a longer USB cable to use the webcam to take photographs about the house and outside. Can I use this telephone cable. It has 4 wires and is used for the telephone but I am not sure if it is the same as the UTP cable.
You need 5 for ground wire

Thank you.

In correction to the needing five statement, If the cable is shielded it'll work with just the four.
bayucandra4 years ago
This man doesn't included the detail way of put the IC and the input power, if some body need more clear picture, try to visit I don't know is the man who wrote this instructables article and the man who wrote the article at the link i gave is same person. But the link i gave have more clear description. The problem only that my link is in Indonesian language, but don't worry it has clear picture just to see.
Hi Bayucandra,
thanks for your idea for using regulator IC7805 to power the usb device at farther end.but what is the maximu length of cable u have used.

anjumraza3 years ago
i was worried after puchasing evo usb for net surfing.signals were very week i made the utp wire and connectors and found that the signals were very high even a distance of 24 feet from computer to usb..thx instructable ...i loved that
I did this with a cheap 25ft UTP cable from e-bay and it worked perfect. I try with USB and web-cam there was no lag or anything like it while watching or capturing video; webcam to backyard, I have fear phobia.
rohit1234 years ago
i want to keep my web cam 50meter away.purpose of keeping web cam far is monitoring of my small brother from my room.does it works properly.

ambo6 years ago
hello,i already follow your procedure for the usb extension using UTP,but i cannot make it detect as a 2.0 usb,coz ill use it with a 2.0 compatible devices.Please let me know if you have an answer for this.thank you
Derin ambo5 years ago
in my experience,USB 2.0 will talk USB 1.1 as well,and USB 1.1 can connect to USB 2.0 hosts.
sintar Derin4 years ago
in my observations a shielded 2 x 20g 2 x 28g good quality cable will do about 25 feet. but it all depends on the voltage drop or resistance of the wire test for example 20ft wire with my multi meter i read 1.1 to 1.2 ohms on the shield but 1 ohm on the vcc and gnd and 1.5 ohms on the data lines but you don't use those values to calculate your voltage drop first you need to subtract your test leads from the resistance since all wire has resistance on my meter they have a .6 ohm reading keep in mind i'm not using a cheap 10 dollar meter here  so that leaves me with .6 ohms on vcc and ground  and .9 ohm on the data lines but we really don't need to worry about the data to much unless your going over 35 40 feet using ohms law E = I R  E being voltage drop I being current (.5 A or 500 ma) and r being resistive load (in ohms)  the formula works out to be .45 volts so knowing that usb won't work below 4.4 say 4.5 to be safe then finding out my computers 5 volt line runs at 5.13 v so  5.13 - .45 = 4.68 volts after voltage drop and thats at max load and most devices don't use the full 500ma theres some room for error  now as long as the signals are clean at the far end then it should work now if you lose to much voltage over your run of cable and you can place a power supply regulated +5v and MAKE SURE TO TEST THIS closer to the end of your cable and just disconnect the +5v from the computer now for those longer distance runs you need to use a larger conductor data pair single wire for each no doubling up here or you can get some nasty interference now if you have enough power larger conductor data wires and you still have a dirty data problem try using  some ferrite rings on both ends they really do help with EMI traveling over wires sorry for the crudeness and no punctuation but i hope this helps somebody
egomez184 years ago
It works perfectly. Later I will give details of how that works best with the same UTP cable. Thank you very much for your idea.
1-40 of 93Next »