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Will AA batteries power this solenoid OK?

Discussion in 'Electronic Basics' started by Scott Fuhrman, Dec 5, 2004.

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  1. Hello,

    I am building a project that uses a wireless RF remote control to
    momentarily fire a solenoid to release a latch mechanism.

    The solenoid I am using is this one:
    http://www.allelectronics.com/cgi-bin/category.cgi?item=SOL-81

    It has a 26.7 ohm coil and rusn at 12 volts, so using ohms lay I
    figured that it will draw about .45 amps during the moment where the
    plunger is retracted.

    Because this project is portable, I would like to keep the weight
    down. My plan was to go with (8) AA batteries to produce the 12 volt
    source. So, are eight AA batteries capable of handling a .45 amp
    current draw for a moment? The solenoid would be actuated for less
    than a second, and fairly infrequently.

    Thanks,

    Scott
     
  2. Fresh AA alkaline batteries will easily be up to your task at hand. To get
    an idea of what they are capable of fresh AA alkaline batteries can
    typically juice out a fair amount more than 10 Amps (IIRC) of short circuit
    current into a low resistance short. A typical two cell AA flashlight lamp
    for instance will often draw around 0.5A from the cells. Zinc chloride and
    carbon zinc batteries are rather another matter. When these types of
    batteries start getting even the slightest bit low they have hideously wimpy
    output capability. Even when fresh and new they are wimpy though could
    still handle your 0.45A for a little while.
     
  3. John Larkin

    John Larkin Guest



    Easily. Alkaline AAs have a short-circuit current close to 10 amps.

    John
     
  4. Cool. Thanks for the replies everyone.

    Scott
     
  5. Guest

    Yes, remember to always use alkaline over cheap heavy duty brands. They
    are far superior in every way.
     
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