What is polarity for an unmarked USB hub?

Posted by Feral Oink on Super User See other posts from Super User or by Feral Oink
Published on 2012-05-13T14:39:16Z Indexed on 2012/06/16 3:19 UTC
Read the original article Hit count: 450

Filed under:

power-supply

|

usb-hub

On my USB hub where the power supply plugs in, the polarity is unmarked (I got it used, from my brother's friend). I need to know what the polarity should be.

I don't think it makes a difference about the brand. Could someone who has a USB hub tell me what the polarity markings are?

This is why I need to know about the polarity: Usually the center pin is positive and the outer pin is negative. But I'm not sure with this, and want to be certain before I plug anything into it.

© Super User or respective owner

Related posts about power-supply

Turn a Computer Power Supply into a Desktop Power Supply

as seen on How to geek - Search for 'How to geek'
If you’re looking for a desktop power supply for your electronics workbench, this tutorial video shows you how to turn a computer PSU into a desktop power supply. In the above video the guys at JumperOneTV show us how to make a desktop power supply. As an addendum to the video; they note in… >>> More
Power supply triggered to start by another power supply

as seen on Super User - Search for 'Super User'
I am building a raid array in a separate enclosure. I will be putting an empty tower case next to an existing tower computer, and this second tower case will only hold hard drives. There are many solutions for connecting the drives in the second case to the raid card in the first case (SFF-8088… >>> More
Recommendation for a redundant 60V DC Powersupply

as seen on Server Fault - Search for 'Server Fault'
We have some Telco-Equipment in our data space center which we had been given by our Telco. What they didn't provide is a redundant power supply and therefore we are struggling with outages of this equipment. What I am searching for is a redundant Power-Supply for 60V and 600W 60 Volt DC output 600… >>> More
Can I use this power supply + case combination without causing problems?

as seen on Super User - Search for 'Super User'
I am putting together a computer with a Antec P180 case and a Thermaltake TR2 RX 650 W power supply. The problem is that the Antec P180 case has a separate compartment for the power supply. With an opening for the on/off switch + ac connector to one side, a wall with a small hole for cables to route… >>> More
What is the minimum power supply wattage needed for a Pentium 2.4GHz system?

as seen on Super User - Search for 'Super User'
It looks like I've got a dead Antec True 330 power supply in an older desktop that has an Intel D845PESV motherboard, a Pentium 2.4GHz processor, 2 dvd/cd writers, 2 hard drives, and other typical devices. I have an even older computer that is not being used that has a 200W power supply. Can a 200W… >>> More

Related posts about usb-hub

Self-powered USB hub and power supply adapter ampere capacity

as seen on Super User - Search for 'Super User'
I am looking for a power supply adapter for my USB Hub so it can support at least 2 bus-powered external hard drives. The hub's rating is 5 volts, 2 amperes. I would like to know if it would be OK to buy a power supply adapter rated at less than 2A. I've been looking for power supply adapters and… >>> More
MacBook Air: USB Hub Compatible with the MBA SuperDrive

as seen on Super User - Search for 'Super User'
A little background to those whom may think this Question to specific: The MacBook Air SuperDrive draws 1A vs 500mA of a normal USB device, and therefore you can't use a standard USB hub powered or unpowered because each port gets 500mA not 1A... Have any MacBook Air users found a USB hub which can… >>> More
Which power USB hub uses if it has external power supply as well

as seen on Super User - Search for 'Super User'
I have 7 port USB hub with external supply. I tried turning it off by removing external power but then it takes power from motherboard and is still working. I have many external hardrives connected to it. i was worrying if i turn off the power it may damage the motherboard by withdrawing so much… >>> More
2.0 speeds on USB hub?

as seen on Super User - Search for 'Super User'
How capable are USB hubs? I have an AirPort Extreme router with a printer attached (it's not powered by USB). I want to extend this and add two hard drives (one for Time Machine and the other for EyeTV recordings). Can a 4-port USB hub (I'm considering this one) achieve USB 2.0 speeds and power… >>> More
Need a quality USB hub that is able to power external hardware

as seen on Super User - Search for 'Super User'
What is the most useful USB hub that you have had experience with. I have a Seagate FreeAgent Go that is powered by USB and I want to get a USB hub that is able to provide me with more USB ports and can power my harddrive. >>> More