Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Supply different voltages using a dual dc supply?

  1. Mar 15, 2013 #1
    Hi all,

    I have
    - 2 ICs that requires -10v and +10v
    - 1 IC that requires -5v and +5v

    How can I power them using one dual dc supply?

    Thanks!
     
  2. jcsd
  3. Mar 15, 2013 #2

    davenn

    User Avatar
    Science Advisor
    Gold Member

    use a +5V and a -5V regulator off the respective +10 and -10V rails
    easy as pie :)

    just make sure your 10V rails are able to supply the required current for the 10V IC(s) as well as the 5V IC(s)

    Dave

    Dave
     
  4. Mar 15, 2013 #3
    Forgot to mention that the dual dc supply is a variable supply used in lab.

    So just to confirm, I need a 7805 and a 7905 voltage regulator for +5v and -5v respectively?
     
  5. Mar 15, 2013 #4

    davenn

    User Avatar
    Science Advisor
    Gold Member

    regardless of if its a variable supply, you will have it set at 10V anyway, so yes a 7805 and 7905

    You have no reason to be continuously varing the voltage do you ?

    Dave
     
  6. Mar 15, 2013 #5

    sophiecentaur

    User Avatar
    Science Advisor
    Gold Member

    I should have thought that two 5V Zener diodes could do the job nicely - if your +-5V current requirement is small.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Supply different voltages using a dual dc supply?
  1. Dual DC power supply (Replies: 3)

Loading...