Connect with us

. .Need some Supply

Discussion in 'General Electronics Discussion' started by keven_atsocal, Mar 18, 2013.

Scroll to continue with content
  1. keven_atsocal

    keven_atsocal

    1
    0
    Mar 18, 2013
    . .Please. .can You Give me some Digram On power supply. .I have a Transformer 30v 0 30v. . How can I have a +15volts and -15volts please help
     
    Last edited by a moderator: Jun 4, 2013
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    11,517
    2,651
    Nov 17, 2011
    It all depends on the current that you haven't revealed to us.

    You can use rectifiers, smoothing capacitors plus linear regulators (ICs). But to regulate 15V from 30C means that the voltage regulator will have to dissipate the heat from 15V (difference between 30V and 15V) times the output current.If for example your output current is 0.5A, the power lost in the regulator is 15V*0,5A=7.5W. That is inefficient and calls for a large heat sink.

    A much better option would be to use a switch mode regulator. At 80% efficiency this regulator will dissipate only 7.5W(1/80%-1)=1.9W, a considerable improvement. However, I doubt that building your own switch mode regulator is something you're up to.

    I can envision two options:
    - get a transformer with ~17 V output and build a simple linear regulator
    - get a kit for a switch mode regulator.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads
There are no similar threads yet.
Loading...
Electronics Point Logo
Continue to site
Quote of the day

-