Page 2 of 8 FirstFirst 12345678 LastLast
Results 11 to 20 of 77

Thread: How to power a USB hub

  1. #11
    Newbie v1per's Avatar
    Join Date
    Dec 2006
    Location
    Salisbury, NC
    Posts
    47
    I think the whole point of wiring the hub into the computer's PSU (not to mention getting a DC-DC PSU in the first place) is to avoid AC-DC inverters. If you can cut a wire, solder another one on to it and connect it to the PSU then why buy a $40 power inverter?

  2. #12
    Newbie
    Join Date
    Jan 2006
    Posts
    32
    Most hubs are 5v DC, since thats what the posts put out.....Just buy a cigarette lighter adapter which puts out 5v DC and splice it onto the hub. Then wire it to your battery and you're all set!

    Shameless plug for where I work: (Radioshack) We sell the adapters with one plug free to put on the end, so you can use the adapter for more than one thing....now you can keep your AC adapter whole, and just splice or even use a cigarette lighter 12v DC to power this one

  3. #13
    Variable Bitrate
    Join Date
    Sep 2005
    Posts
    284
    Except for those people who

    1) Don't have a cigarette lighter or
    2) Have a cigarette lighter that is hot all the time.

    I like the fact that my computer accessories are only powered from my computer psu and only powered when the pc is on.

  4. #14
    What can I say? I like serial. Curiosity's Avatar
    Join Date
    Mar 2004
    Location
    Florence Yall, BFKY
    Posts
    2,684
    I use something like this:
    http://cgi.ebay.com/LUCENT-5V-10A-DC...QQcmdZViewItem
    They are very efficient and usually work at lower than rated voltages and take very few support components.

  5. #15
    Variable Bitrate
    Join Date
    Oct 2006
    Posts
    274
    Well, at the moment I do not have access to a cigarette lighter.

    I think the simplest solution was buying a HUB that has the same input voltage as my available pwr/gnd source (which I believe is 12v), and cutting off the AC adapter so that I can put the end on those lines.

  6. #16
    FLAC MP3DUB's Avatar
    Join Date
    Jan 2002
    Location
    Chicagoland, IL
    Posts
    1,783
    Odd are you could also simply find a suitable barrel connector at radio shack (or mouser, or digikey, or etc) instead of hacking up the power cord from the power brick.

    You could also build/buy your own 5v (or what ever you need) regulator circuit.

    That said I've run a 12v screen off the 12v from my psu, with the screen being in my dash and the psu in my trunk by using cat5 as the conductor.

    And finally, the inelegant solution that I still use is an inverter. I used an inverter on old installs, so it was already wired in. All it powers now is the hub and the usb slim cdrw.

    Edit: and the spec for usb is most certainly 500ma per port max.
    -Nick

    _____________________________
    Since when is insanity a bad thing?
    www.mp3vw.com

  7. #17
    Newbie tooby's Avatar
    Join Date
    Aug 2006
    Location
    St. Louis
    Posts
    44
    i dont know why so many people are opposed to buying a converter, they are an easy install in the first place, and as long as you run a nice switch in line you'll never have to worry about ac dc anything again. I for example enjoy plugging a good xbox or nintendo into my outlet at any time, or any phone chargers, or anything you can imagine under 400 watts. i'm again, gonna vote for putting a nice converter under a seat or something, it means that in the future you can just plug anything in, have multiple outlets available at any time (i have 3 open), and it turns all future powering absolutely effortless
    VIA EPIA-EN12000EG - 512 MB DDR2 533 - M2-ATX - 60GB HD - VoomPC enclosure

  8. #18
    Fusion Brain Creator 2k1Toaster's Avatar
    Join Date
    Mar 2006
    Location
    Colorado, but Canadian!
    Posts
    10,045
    Quote Originally Posted by tooby View Post
    i dont know why so many people are opposed to buying a converter, they are an easy install in the first place, and as long as you run a nice switch in line you'll never have to worry about ac dc anything again. I for example enjoy plugging a good xbox or nintendo into my outlet at any time, or any phone chargers, or anything you can imagine under 400 watts. i'm again, gonna vote for putting a nice converter under a seat or something, it means that in the future you can just plug anything in, have multiple outlets available at any time (i have 3 open), and it turns all future powering absolutely effortless
    noise. i.e. static. Also not very efficient.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  9. #19
    What can I say? I like serial. Curiosity's Avatar
    Join Date
    Mar 2004
    Location
    Florence Yall, BFKY
    Posts
    2,684
    I agree. Waste of space. Efficiency of converting 12~18V DC to 120V square wave AC back down to 5V DC. AC noise after spending all that money on amps.

  10. #20
    Newbie tooby's Avatar
    Join Date
    Aug 2006
    Location
    St. Louis
    Posts
    44
    even if they arent super efficient, you can get a lot more out of them than you can get out of ANYTHING you plug into your cigarette lighter, depending upon your car the most you can get outta the cig lighter is around ish 250 watts, and ok, i agree, they arent efficient, but they still crank out more juice, and again, i'm gonna vote extremely convienent, i just went on a road trip, when i needed to charge two cell phones and one camera battery all at the same time, i couldnt have done that with one cig adaptor, and i could have even gone further and powered a nice big lcd tv at the same time as it runs an xbox 360 for entertainment along with all that other crap for the passenger, and to do all this, all i gotta do is plug it in, no extra wires except for the ones i'm plugging in, no mess, no problem, it looks like yer in a house

    having something constantly ready to go and wired into your car battery is just absolutely convienent, and in the end if you want a clean install of all yoru stuff, you arent going to be plugging something into your cig lighter every time you need to charge or power something

    and the 400 watt converter cost me like 30ish dollars about 4 years ago
    VIA EPIA-EN12000EG - 512 MB DDR2 533 - M2-ATX - 60GB HD - VoomPC enclosure

Page 2 of 8 FirstFirst 12345678 LastLast

Similar Threads

  1. Power USB Hub with M2?
    By Arty13 in forum Power Supplies
    Replies: 17
    Last Post: 01-04-2007, 08:16 PM
  2. USB power question
    By maxxell in forum General Hardware Discussion
    Replies: 3
    Last Post: 04-13-2006, 03:06 PM
  3. Usb hub power source?
    By dmcdlrn in forum Power Supplies
    Replies: 5
    Last Post: 04-01-2006, 02:03 PM
  4. My USB/Wifi troubles.
    By JPuma in forum General Hardware Discussion
    Replies: 0
    Last Post: 09-23-2005, 11:44 AM
  5. usb hub power problem
    By modUlarBeing in forum Power Supplies
    Replies: 2
    Last Post: 11-21-2004, 06:34 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •