Lost my Head ???

Discussion in 'General Electronics Chat' started by Dr.killjoy, Jun 29, 2014.

  1. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
    1,190
    156
    Sorry for the another post asking a stupid question .. . I am still working on the 5v supply but has been on the back burner since I got a used truck for cheap needs a lot of work ... I just did front wheel bearing and brakes and dics all around ... But anyways I choose to use a liberal regator .. Every time I look up a regulator for my purpose the Lm317 always comes up as the best specs .. Am I missing something or losing my head or is it perfect choice or is there a better option ????
    Oh the input is 12v DC ...

    Thanks
    Jay Sr
     
    Last edited: Jun 29, 2014
  2. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    5,435
    1,305
    For 12v DC to +5v DC the most common part is a 7805 regulator in TO-220 package. :)
     
  3. crutschow

    Expert

    Mar 14, 2008
    13,003
    3,232
    An LM317 is often mentioned because it is commonly used, cheap, and almost bullet-proof. But for minimum parts count a 7805 is a good choice also.
     
  4. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
    1,605
    The 7805 does 5V all day long just by itself (plus one input and one output cap that every regulator needs).

    The 317 needs two resistors to set the output voltage. Get it wrong and the output is also wrong. The advantage is you can tweak it to your exact needs.
     
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