Powering multiple devices

Discussion in 'General Electronics Chat' started by philuk2000, Jun 20, 2014.

  1. philuk2000

    Thread Starter New Member

    Jun 20, 2014
    4
    0
    Hi All,

    My power supply for my router has blown up so i'm looking to replace it. Before I do I would like to know if the following is possible:

    I have 4 devices that all require 12v input but with differing ampages.

    Device1: 1amp
    Device2: 1amp
    Device3: 1amp
    Device4: 2amp

    Would a single 12v 5amp power supply be able to power all 4 devices or does each device require a dedicated 12v?

    Best regards
     
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,769
    969
    A single power supply "should" be sufficient however personally I would go 125% or more over the calculated max current rating of the sum of all devices just as a safety precaution.

    Its never a good idea to run a power supply at 100% all the time..
     
  3. philuk2000

    Thread Starter New Member

    Jun 20, 2014
    4
    0
    Excellent... so I am understanding it correctly then, if I got a 6.5amp 12v power supply that would be more than sufficient overhead, is that correct?

    (Please excuse my ignorance in advance :D)
     
    Last edited: Jun 20, 2014
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,979
    744
    if you want 12V @ 10amps use an old atx psu,plenty of amps there.
     
  5. philuk2000

    Thread Starter New Member

    Jun 20, 2014
    4
    0
    Good idea, I have actually got a 850W boxed corsair psu thats doing nothing. I'd need to connect it up to one of these thos to power my 4 devices.

    http://www.ebay.co.uk/itm/CCTV-4-wa...-/180878779322?pt=UK_CCTV&hash=item2a1d3723ba

    This is going a bit off from my original idea lol but I guess it's doable - although i'm not the best when it comes to wiring things up.

    I just found this molex to 6.5mm converter - I need a 2.1mm converter (or is that just outter size)!

    http://www.ebay.co.uk/itm/Phobya-20...uting_CablesConnectors_RL&hash=item5d464b9239

    Scrap that - wrong connection, I'll have to make one myself.
     
    Last edited: Jun 20, 2014
  6. philuk2000

    Thread Starter New Member

    Jun 20, 2014
    4
    0
  7. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,530
    1,248
    Everything you have said will work. But...

    If something inside your router fails, there is a big difference between having a power source limited to only 12 W and one able to supply 84 W (plus margin, closer to 100 W). Consider adding an inline fuse for each breakout. Any voltage rating will work.

    ak
     
Loading...