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voltage regu;ator....again

Discussion in 'General Electronics Discussion' started by donkey, Mar 2, 2013.

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  1. donkey

    donkey

    1,293
    56
    Feb 26, 2011
    hey guys and gals. need a simple schematic for a voltage regulator
    I plan to use 4 D batteriesand want an output of 5v. if anyone can help that would be great. if you are really nice could you include a way to monitor battery life too?
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    11,513
    2,651
    Nov 17, 2011
    Simple solution: low dropout voltage regulator, e.g. LM2940 (or any similar). Drawback: need at least 5.5V at the input, so operated from 4 batteries the output will quickly stop regulating.
    Better solution: Use a buck-boost converter, e.g. LTC3534 (500mA) or LTC31112 (2.5A).
    Drawback: not so simple.
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,496
    2,837
    Jan 21, 2010
    Not so simple, but very cheap from eBay :)

    But you don't get to build it yourself :(
     
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