Auxilary Battery switching

Discussion in 'The Projects Forum' started by Hiamsnhu, Jul 1, 2012.

  1. Hiamsnhu

    Thread Starter New Member

    Jul 1, 2012
    1
    0
    Hello,

    I want to design a simple circuit which connects a 3.35V battery to a circuit, when the input voltage falls below 9V or exceeds 35V. Please help me out.
     
  2. paulktreg

    Distinguished Member

    Jun 2, 2008
    611
    120
    Sounds like you need a Window Comparator. Try Google.
     
  3. afternath

    New Member

    May 7, 2012
    17
    0
    It will not be simple...
    With the few informations you provided, you will need comparator, voltage references, relay, relay driver, etc...
     
  4. praondevou

    AAC Fanatic!

    Jul 9, 2011
    2,936
    488
    More details please. How is the 3.35 battery related to the "input voltage"?

    Are these isolated circuits?

    Explain exactly what you plan to do. It is probably not too complex.

    please provide

    1. current from the "input voltage"
    2. current from the 3.35V battery
     
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