powering 2 modules with single output PSU

Discussion in 'The Projects Forum' started by wasabi, Jun 5, 2012.

  1. wasabi

    Thread Starter New Member

    Jun 5, 2012
    Hi guys

    im new to electronics and still at a sub basic level, i wanted to ask for sound advice before hand

    i have a single output switching PSU with an output of 15vdc 3a to power my project

    the 2 modules im using both require 15v and both need around 0.5a

    how do i connect both on the same power supply?

    i have looked at similar projects using a toroidal psu coupled with a bridge rec and large smoothing capacitor but i was told by a friend i can not use a smoothing cap with DC, only AC then rectify it?

    some ideas / solution would be great

    i can build basic circuits from scematics so a reg/splitter so open to anything

  2. mcasale


    Jul 18, 2011
    I'm not sure what "modules" you refer to. You said the switching supply provides 15VDC at 3 amps. Just connect this directly (in parallel) to each module.

    What is the output from the "toroidal" power supply - DC or AC?

    Depending on what you're trying to do, you can put capacitors on AC or DC.

    If you're trying to make a DC supply from an AC supply (like a transformer), you'll need to rectify and then filter with a capacitor. Google "full-wave rectifier".
  3. wayneh


    Sep 9, 2010
    +1 Assuming the AC versus DC issue is resolved, just think of your modules as light bulbs being plugged into an outlet. Parallel loads on a single supply.
  4. wasabi

    Thread Starter New Member

    Jun 5, 2012
    my psu is DC.

    i will connect them in parralel

    thanks for the advice