1
vote
1answer
70 views

External Hard Drive To Android Tablet and Power Supply

Is it possible via USB Y cable or any other means to connect a Samsung 10.1 30 pin to an external hard drive and at the same time, an external power supply to the Hard Drive. I have concluded getting ...
0
votes
0answers
26 views

Attaching SCSI drive through USB

I have a number of wide, 68-pin SCSI drives for which I need to copy the data off. I have tried to use a wide-to-narrow SCSI adapter (68-pin to 50-pin) coupled with an Adaptec SCSI-to-USB adapter ...
0
votes
2answers
63 views

Linux: disbale USB without disabling power

TLDR I want toggle between the following usages of a usb-port via the terminal: use like a normal usb-port only supply energy to charge Story I recently got me something like a magna doodle ...
1
vote
0answers
148 views

Can I Power the front-panel USB 2.0 ports with the power supply's 5V rail?

I have a high power (700ma+) USB device I wish to use on a single front-panel USB port. The USB specification in Wikipedia states: The USB 1.x and 2.0 specifications provide a 5 V supply on a single ...
0
votes
3answers
50 views

Can a USB hard drive work with only pins 2 and 3 connected to the host?

I want to plug a bus-powered USB disk into a tiny computer which does not have adequate power available (Raspberry Pi). I can solder a USB y-cable, which sends pins 1 and 4 to a separate 5V power ...
0
votes
1answer
133 views

Computer stopped working after connecting to LED sign (using USB cable)

I have this Chinese (important) LED sign that can be connected to a computer or it can automatically read the information (what text to show) from USB flash drive right after connecting it. It also ...
4
votes
1answer
9k views

What is the power output of a USB port?

As the title says, what's the power output of a USB port? Is it a standard value, or it may change depending on manufacturer/model, and so on? If that value is not standard, how can one determine ...
0
votes
1answer
74 views

Can as device that runs of USB be powered from a charger?

I have a Dreamgear PS3 Elite Gaming Headset that needs to be plugged into a USB port to power it, it cannot be used as just a "normal" set of headphones though it has a standard 3.5" plug as well ...
0
votes
0answers
296 views

USB Keyboards Randomly Disconnect

I have a puzzle for you; I've been banging my head against the wall for the past week trying to figure this out, and I just have no idea what it could possibly be. If you can figure it out I will give ...
1
vote
0answers
213 views

USB ports causing Wireless and Mobile Phone tethering drop out

I have a problem with my USB ports and I can't seem to pinpoint the problem. I'm hoping that I can get some idea as to how to troubleshoot my problem. Problem description: I recently bought a USB ...
0
votes
0answers
67 views

How to kill the issue with Linux, where most modern USB devices coming with 500mA MaxPower?

I have Sound card, Camera devices USB interface, all of them i have are 500mA MaxPower showing using lsusb -v | grep MaxPower Now those hardwares with Linux works about 1 hour or half hour and then ...
0
votes
1answer
41 views

Probe in USB Socket Caused Computer to Power off

A 110V-220V Electronic Tester Screwdriver was inserted into USB Slot and the entire computer was powered off. I thought the PSU might have been short circuited. I pressed the power button several ...
2
votes
0answers
91 views

Loading multiple USB devices using one power supply without needing a PC [closed]

I work in a web development company and we have many mobile devices that we need to test our software on. We charge these devices each with their own adapter plugged into a socket, but that ...
2
votes
1answer
303 views

Under Linux, how can I tell the real power consumed by a usb device

I have a freecom external USB HDD, which wont run from a powered hub, so I imagined it was something to do with the powered hub not supplying enough power. However when I connect it directly to a ...
0
votes
2answers
476 views

are dual 2.5" hdd enclosures without external power possible / even exist?

I am looking for a HDD enclosure which can make two 2.5" drives available from a single USB port, while not using any external power adapter, i.e. powered entirely from USB port. I failed to find any ...
0
votes
0answers
263 views

Can I power a nexus 7 through a powered USB hub?

I am building a setup to use my Google Nexus 7 as a SNES. I have the games figured out, and my plan is to plug a USB hub into my OTG cable which is plugged into the device. In the hub, there are two ...
2
votes
1answer
1k views

USB seems not to deliver enough power

Recently I had some problems with USB devices (never had that before). My mouse, my keyboard and my wireless adapter sometimes just wouldn’t work anymore for some reason. Yesterday I got a message ...
0
votes
2answers
141 views

Using usb as power slot

I recently bought a 3tb Seagate Expansion external hard drive. I didn't know that it requires external power supply. I am worried about the fact that the hdd will get damaged if suddenly power goes ...
8
votes
2answers
332 views

Where can I see what caused Windows to make the 'hardware disconnected' sound?

Whenever I switch my desk fan on or off, Windows makes a sound as if a USB device is being (dis)connected. I haven't been able to determine which device is being affected by the power spike, so I ...
0
votes
1answer
248 views

Do USB devices draw current from the computer if a powered hub's current “runs out”?

I have a few heavy duty devices and a powered hub and I wonder what's the flow of current in those things.
0
votes
1answer
540 views

My usb ports are burning my flash drives. Why?

So I just assembled a new computer and I have a ASUS Rampage IV Extreme with a Intel i7-3820 CPU. I have Corsair 650W power supply and I connected it to the motherboard using the 24-pin connecter and ...
2
votes
1answer
285 views

Is there an instrument or software that can measure the ACTUAL maximum power available to a USB port?

I use a non-self-powered USB modem device for a solutions I provide to multiple customers, and very often I encounter a problem in which the devices stops working due to many reasons, one of which I ...
1
vote
2answers
353 views

Motherboard/PSU crippling USB and Sata

I very recently bought a new desktop computer. The motherboard is: Z77MX-D3H and the power supply is ocz zs series 550w. The issue I have is that once I boot to the operating system (I have tried ...
0
votes
1answer
88 views

Can 20pin PSU cause usb stick corruption

Getting constant usb stick corruption issues when using an old 200W PSU with 20pins with both NTFS and FAT32. Can the old PSU cause the corruption? PC is running fine otherwise (no BSOD, freezes).
0
votes
2answers
656 views

Using my laptop as a USB power supply

I've been using my laptop as a USB charger for my media player (usually an iPod Touch). Each night, I play an audio-book from my media player (usually iPod Touch), which needs to be charging (via ...
2
votes
1answer
431 views

Adding more drives to motherboard with two SATA slots only?

Hardware n00b, building a freeNAS 8 box. Motherboard has 2 SATA slots: http://www.jetway.com.tw/jw/motherboard_view.asp?productid=309&proname=M26GT3-SVP All 3 PCI slots are empty. I have 3 more ...
31
votes
3answers
26k views

How do you check how much power a USB port can deliver?

Some laptops have a special USB port that can deliver more power than the other ones. However it is not always easy to identify which one is the good one, nor how much power it can deliver. So is ...
4
votes
3answers
2k views

What is the bigger cylindrical part found at the end of USB cables but also some laptop PSU cables? [duplicate]

Possible Duplicate: What is that cylinder on cables? What's this part?
13
votes
4answers
10k views

How can I guess if a USB cable will power my devices?

I've had problems with one long (4 meter) USB Mini-B to USB Type-A cable not being able to boot a 2.5'' external hard disc due to not supplying enough current. On top of that, the cable used a Type-A ...
1
vote
1answer
218 views

Troubleshooting desktop PC not booting if network and USB ports are connected

My current desktop machine is composed by: Intel q6600 Gigabyte EP43-DSL3 4GB DDR3 2HD S-ATA 750MB Seagate DVD-RW S-ATA Keyboard, webcam, headphones and the usual stuff connected to the USB ports. ...
5
votes
5answers
34k views

Charge a laptop via USB power (500mA)?

My laptop is almost dead and I do not have the charger. Is there anyway I can DIY a charger for a laptop. Even if it takes 20 hours. To make it clear, I want to send power from a usb port on another ...
0
votes
1answer
1k views

Self-powered USB hub and power supply adapter ampere capacity

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 ...
2
votes
6answers
5k views

Is it safe to plug USB devices on 220v wall sockets?

I have an ipod touch and since then I've been charging it on the PC via USB. I just want to know if it is safe to use those wall socket chargers for USB devices? Is it different on every device, or is ...