Posted on 04/16/2013 9:03:44 AM PDT by djf
I have an eight port ethernet hub that has unfortunately become separated from it's power supply.
I've googled everything I can see on it to find out what the power rating is, cause I have tons of power supplies, and can rig one up easy IF I know the voltage and +/- setup.
Anybody know any way to figure this out? I have one of the universal power supplies that can deliver 3V, 5V, 6V, 9V, etc but don''t want to blow it up by hooking the voltage up backwards!
Would appreciate any hints and tips!
Start with 5V - most computer electronics are made for that
if it doesn’t work go up by 2 until it turns on
you should be OK
If you have the manufacturer and model, you should have no problem finding wattage ratings for the device.
Does it have a label on the back?
Check the power supply input plug on the back of the unit. The specs are normally there...e.g., something like “3v” and the polarity will also be shown. Power consumption may not be there, but it’ll be low enough that pretty much any power supply matching the voltage will do.
Not to worry if your replacement supply can supply much more current than needed - the unit will draw only what it needs if the supply voltage is correct.
You should be able to get an eight port hub for $5 at the local Salvation Army.
A few more hints might be helpful. What hub you are trying to use? How did it become ‘separated’? That sort of thing.
Many of them are 12vdc but if you Google the make and model of the hub, you can probably find out.
That’s kinda what I was thinking... the reason it is separated from the power supply is I might have sacrificed it in the past to hook up to something else!
I have two boxes full of various voltages, parity, amp rating... what can I say, I’m like them hoarder people!
Make? Model? Throw me a bone here people.
I have started taping the gadget it is meant for to the chord so I can easily identify what it was for. I have about 100 of those silly things
OK the polarity is indicated on the case but not the voltage - I tested with increasing voltage, 1.5 3 and at 4.5 the lights start flashing, then go out... so I’m thinking 5...
I have started taping the gadget it is meant for to the chord so I can easily identify what it was for. I have about 100 of those silly things
Good idea.
cord
the OUTER part of the connector is *usually* the ground
(PLEASE correct me anyone if i am wrong)
you won’t go wrong with +/- a volt or so
Just dont plug 120AC into it
I started taping a TAG to my devices and cords so I know what the voltage is and what device it goes to
I blew up a laptop once that had a 12V input.
Hooked it to a car battery.
Worked for a few minutes, then started smelling funny... there was a flash, then nuthin
Couldn’t handle 12.6 volts. Actually, probably too many amps at a bit of an overvoltage
chit happens - it was a freebie, now its spare parts, no biggie!
If that's really a "hub", and not a switch, dude, replace it. Hubs are so "90s", like zip drives.
Polarity should be marked on the hub. There should be a diagram with a broken line above a solid line, or the reverse. This indicates polarity. Google "DC polarity markings" to learn more.
Sorry, I said, USB, I meant to say 10baseT.
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