Replacing batteries with wall wart (voltage question)

Discussion in 'The Projects Forum' started by majhi, Nov 16, 2014.

  1. majhi

    Thread Starter Member

    Jul 2, 2014
    49
    1
    Hello all. I have one of those portable wand hand scanners that runs on 2x AA batteries. I'm wanting to build a set of mock batteries so I don't keep burning through real ones. The thing is, the wall wart I have measures 3.4v output and 2x AA only provide 3v. If I hook this up, will I damage my device? Or do I need to build a voltage regulator? Thanks in advance.
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    Fresh Alkalines are about 1.65V each, so about 3.3V for two, so it will probably work just fine.
     
  3. #12

    Expert

    Nov 30, 2010
    16,304
    6,813
    No argument here. I've never heard of a device that drops dead for a tenth of a volt difference from what the label says.
     
  4. majhi

    Thread Starter Member

    Jul 2, 2014
    49
    1
    Thanks guys. I didn't think it would matter, but better safe than sorry.
     
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