How to Convert 5V DC to 12V DC?

Discussion in 'General Electronics Chat' started by GeorgeBurgess, Nov 4, 2012.

  1. GeorgeBurgess

    Thread Starter New Member

    Nov 4, 2012
    I have a power supply with a different connector, and output (on one of 24 pins) to the circuit input I am attempting to use it with, so basically I got an electronics engineer I know to make an adapter up for me, he did a great job in doing so however I have one issue, one of the pins of this adapter's input side is of 5V DC but I need it to be 12V DC on the output, the engineer used a simple 0-240V to 12V transformer however this doesn't appear to be working.

    What is the best way to achieve this 5V DC to 12V DC conversion? Thank you in advance.
  2. BringMeAnother

    New Member

    Oct 21, 2012
    I'm no expert or anything, but I have been interested in the question and found the LM2577.

    Edit: I'd be interested in finding a better or more efficient way. I need that 12V output too.
  3. Audioguru


    Dec 20, 2007
    A 12V transformer produces a peak voltage of (12V x the root of 2=) 17V. A bridge rectifier reduces it to 15V at a high current or a little more at a low current. A filter capacitor charges quickly to 15VDC and can feed a 12V regulator.
  4. tshuck

    Well-Known Member

    Oct 18, 2012
    Provided the your current requirements are meet, you could use a DC-DC boost converter.
  5. ramancini8

    Active Member

    Jul 18, 2012
    Audioguru has the answer; rectify the raw 17V ac and regulate it with a 7812.
  6. bountyhunter

    Well-Known Member

    Sep 7, 2009
    what current level?