Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Electrical & Lighting (https://www.askmehelpdesk.com/forumdisplay.php?f=105)
-   -   Transformer polarity (https://www.askmehelpdesk.com/showthread.php?t=779299)

  • Dec 18, 2013, 02:39 AM
    Afefe10
    Transformer polarity
    Lost transformer-ac110/120v,output-DC 9v 400/500ma. No polarity info. Have 3 universal adapters with polarity switches. Is there a way to figure out polarity so I don't fry the multi- action x- mas musical figure?
  • Dec 18, 2013, 02:48 AM
    Afefe10
    Polarity
    Are all 9V transformers the same polarity?
  • Dec 18, 2013, 04:49 AM
    stanfortyman
    No.
  • Dec 18, 2013, 04:49 AM
    stanfortyman
    Do you own a multi-meter?
  • Dec 18, 2013, 01:44 PM
    Afefe10
    Quote:
    Originally Posted by stanfortyman View Post
    Do you own a multi-meter?
    . Yes more then one,but need to relearn how to use. Thanks for your 9 V ans.
  • Dec 18, 2013, 02:45 PM
    Afefe10
    Quote:
    Originally Posted by stanfortyman View Post
    No.
    Thank you
  • Dec 18, 2013, 02:51 PM
    ma0641
    Most DC adapters have the polarity marked on them. As a rule, but not 100%, the center is positive.
  • Dec 18, 2013, 04:58 PM
    Afefe10
    Quote:
    Originally Posted by Afefe10 View Post
    Are all 9V transformers the same polarity?
    Thanking Stanfortyman & all others for ans.

    • All times are GMT -7. The time now is 12:25 AM.