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wall warts? — Parallax Forums

wall warts?

carl vianellicarl vianelli Posts: 11
edited 2014-02-23 14:37 in General Discussion
I have a bunch of them,,, but anyway , I have a wart that says 9 v output, but my meter says it's 13.25v,

Comments

  • Peter JakackiPeter Jakacki Posts: 10,193
    edited 2014-02-22 19:44
    carl vianelli wrote: »
    I have a bunch of them,,, but anyway , I have a wart that says 9 v output, but my meter says it's 13.25v,
    The old style mains transformer/rectifier type are unregulated and the voltage rating is nominal under load. Unloaded they can read much higher. In other words, this is normal.
  • carl vianellicarl vianelli Posts: 11
    edited 2014-02-23 10:09
    thanks,i thought it probably was a load thing.thanks again!
    i also have a lot of noise {buzzing) coming from my wart (not physically but electronically)
    i'm hoping some capacitors will stop this,does anyone have a answer ,thanks
  • GadgetmanGadgetman Posts: 2,436
    edited 2014-02-23 10:40
    Junk it!

    It's not worth the bother to clean up the output when good ones cost so little.
  • xanatosxanatos Posts: 1,120
    edited 2014-02-23 11:36
    Gadgetman wrote: »
    Junk it!

    It's not worth the bother to clean up the output when good ones cost so little.

    ...or cost nothing. In my town, we have an annual Electronics Recycle day (and there are several in surrounding areas at many different times). Most collect some small fee for the big stuff, and let you drop off little stuff for free to keep them out of the landfills. Most of them allow electronics buzzards like myself to scavenge. On average, I pick up 50 to 75 new wall-warts a year, in every voltage from 3 to 48, and more and more, a lot of them are switchers with good voltages & regulation right out of the gate.

    If you're really lucky, you can find a few things with steppers, servos and solenoids in them!

    I haven't had to buy a wall wart for well over a decade now, and I use a lot.
  • xanaduxanadu Posts: 3,347
    edited 2014-02-23 14:20
    Should be 9v and it is putting out 13v? FREE ENERGY! Sell it for millions.
  • xanatosxanatos Posts: 1,120
    edited 2014-02-23 14:37
    xanadu wrote: »
    Should be 9v and it is putting out 13v? FREE ENERGY! Sell it for millions.

    LOL Xanadu! :)
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