How to Extend yout USB using UTP

Step 3 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.

Comments

[zeefar]

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?

[Dexterdoom]

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.

[grundisimo]

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.

[k_man93]

 what if you use a USB "y" cable? that draws power from 2 ports, therefore doubling the power... am i correct on this?

[grundisimo]

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.

[charlie millionaire]

Your cord must be too long then

[ambo]

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]

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]

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

[spudgunster]

The USB works in a way that theoretically limits any cable length to 16 feet, If I remember correctly, that includes the powered repeater cables too. I think they do have some usb to cat5 converter boxes, but thats way different from this instructable. This instructable will not work, it's not magic. with UTPs, you won't get much more than 15', thats my guess

[lordmarx]

you need a booster for a longer cable. or try to surf and look for an active extender.