Timeline for Can Current Backflow from Powered Hub's Adapter & cause PC Damage?
Current License: CC BY-SA 3.0
11 events
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| Jun 7, 2014 at 19:59 | comment | added | SuperUserMan | Something similar about backflow current being discussed here raspberrypi.org/forums/… Can you guys have a look ? i didn't get much into my head from the talk | |
| Jun 7, 2014 at 19:51 | comment | added | SuperUserMan | Guys Guys, looks like i didn't make myself clear. There is no damage/short circuit as such to anything(even after >24hrs of using this setup including 4 Wifi Adapters plugged in (after which i switched PC off & saw the Chassis fan moving etc & detected this thing)).See Setup image @OmnipotentEntity, yes i feel Repeater USB cable cum HUB can be low quality & may be the cause . it must be allowing current which is usually supplied to Wifi Adapters to run back into 10m cable length and back into USB port and thus PC circuit. Thats why i am trying to isolate the wrong component here allowing this | |
| Jun 7, 2014 at 19:08 | comment | added | user | @OmnipotentEntity Yes, but that's not because of the short circuit really, it's because of improper isolation of the mains from the internal electronics. The way you wrote it it sounded like a TTL short-circuit situation, not a PSU mains side to equipment TTL side short. | |
| Jun 7, 2014 at 18:50 | comment | added | OmnipotentEntity | @michael it can if the short is between a 220v line and a 5v line. Either in the power brick or the device if internal. | |
| Jun 7, 2014 at 18:48 | comment | added | OmnipotentEntity | While USB ports in specific are designed to accept 5V power, because power is leaking from the USB Hub i have concerns about the quality of the hub, and whether or not it may short seriously in the future. It should be noted that it already should absolutely not be doing what it's doing right now. Which means that you're probably already exceeding the capacity of the hub, which increases the chance of a power related failure situation. | |
| Jun 7, 2014 at 18:48 | comment | added | user | @OmnipotentEntity A short circuit by itself does not change the voltage. It might however lead to a higher current than designed for, depending on some other things. | |
| Jun 7, 2014 at 18:44 | comment | added | OmnipotentEntity | Overpower meaning higher voltage than expected. In the event of (for instance) a short in a device. | |
| Jun 7, 2014 at 18:41 | comment | added | SuperUserMan | couple more 3)What can be at fault here for allowing current to flow backward, if so? A)Repeater cable cum hub B) Power adapter.........I just added picture of Setup too in 1st post.Thanks | |
| Jun 7, 2014 at 18:25 | comment | added | SuperUserMan | Thanks but 1)Can you explain "Overpower"? 2)Given that power adapter is supplying 5V only,which is normally available in USB port & amount of current flow only depends upon how much an electronic parts needs, why should it damage it? (other than the fact that it is surely causing wear & tear of chassis fan (& other electronic components, which i can't detect, if so) & more electricity bill).....Saying so, i would like to inform that i detected this after about 20 hrs which includes hour of PC being turned off (when that Current/voltage was kind of reverse flowing). PC remains fine till date. | |
| Jun 7, 2014 at 18:22 | history | edited | OmnipotentEntity | CC BY-SA 3.0 |
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| Jun 7, 2014 at 18:15 | history | answered | OmnipotentEntity | CC BY-SA 3.0 |