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  1. #1
    Junior Member
    Join Date
    Jan 2016
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    8

    pieCorePlayer hardware question

    I'm looking at building a pCP in an existing housing using a raspberry pi zero w and a DAQ. I have 24V, 18V, or 12V DC (clean) available from the existing power supply and was wondering what my best option is for stepping this down for the raspberry pi? Would a Pololu 5V, 2.5A Step-Down Voltage Regulator D24V22F5 work or is the RPi input going to be too noisy for audio?
    Randy
    2xBoom, 3xRadio, 1xDuet, 1xSoundbridge

  2. #2
    Senior Member Greg Erskine's Avatar
    Join Date
    Sep 2006
    Location
    Sydney, Australia
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    1,569
    hi rdb,

    Give it a go. I have a similar buck convertor I have been meaning to try. Its in my box of things to try!


    Maybe adding an additional cap on the RPi0 power input will help?

    regards
    Greg

  3. #3
    Junior Member
    Join Date
    Jan 2016
    Posts
    8
    Quote Originally Posted by Greg Erskine View Post
    hi rdb,

    Give it a go. I have a similar buck convertor I have been meaning to try. Its in my box of things to try!


    Maybe adding an additional cap on the RPi0 power input will help?

    regards
    Greg
    Thanks Greg. If I had all the bits and pieces, that's exactly what I'd do. Alas, I need to order them and don't have a scope at home to check the ripple. I figured I'd ask to see if anyone else has done something similar before going further.
    Randy
    2xBoom, 3xRadio, 1xDuet, 1xSoundbridge

  4. #4
    i have tried various voltage regulators from switch mode to venerable lm7805 to new generation low drop outs (LDO). There is a jump in sound quality when going from switch mode to linear. but then you have to deal with heat esp with rpi 3b+. with your pi zero which i also love above all pi's i would try one of the newer LDO's if you are drawing less then 0.5 A. http://www.ldovr.com/category-s/118.htm

    if you have more budget and enthusiasm and prefer discrete components over IC's these are super regulators: https://sjostromaudio.net/cart/en/su...eference-lm431

    pi's and audio hats respond very well to the quality of the incoming power

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