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  1. #1
    Join Date
    Jun 2015
    Posts
    28

    Breakout board power, Which Power pack?

    Hey All,
    I wanted to power my Chinese BOB with a power adapter instead of the USB port.
    I have 2 adapters to chose from, 5.3v 500mA or 5v 2.5A.
    Which is better to use to power my chinese CNC BOB.
    Here is an image of the board, for clarification.



    Thanks
    Linrox

  2. #2
    Join Date
    May 2015
    Posts
    684

    Re: Breakout board power, Which Power pack?

    I'd go with the 5 volt one myself. I don't think the 2.5 amps will worry you at all.
    Rod Webster
    www.vehiclemods.net.au

  3. #3
    ericks Guest

    Re: Breakout board power, Which Power pack?

    I agree it's better to use a separate psu. Like Rod said the 5V is fine

  4. #4
    Join Date
    Mar 2007
    Posts
    2083

    Re: Breakout board power, Which Power pack?

    are both power supplies regulated ??

    if both supplies are regulated

    the 5.3V supply can be use as its within the 5V plus or minus 10% limit for TTL logic IC's

    if the 5.3V supply is a phone charger - don't use it , they are not normally regulated

    John


    PS
    the breakout board circuit
    Attachment 406162

    link to the data sheet for the 74hc14 IC used on the breakout board
    https://assets.nexperia.com/document...74HC_HCT14.pdf

    from page 4
    the supply voltage

    Click image for larger version. 

Name:	74hc14 supply voltage.jpg 
Views:	0 
Size:	48.4 KB 
ID:	406168
    Attached Thumbnails Attached Thumbnails 74hc14 supply voltage.jpg  

  5. #5
    Join Date
    Jun 2015
    Posts
    28

    Re: Breakout board power, Which Power pack?

    The 5.3V was from a old mobile charger. I thought the current might be a bit low, at 500mA.
    The 5V2.5A was from a external usb hub.
    Thanks All for your replies.

  6. #6
    Join Date
    Apr 2014
    Posts
    432

    Re: Breakout board power, Which Power pack?

    I have one of these the best option I believe .
    Attached Thumbnails Attached Thumbnails download.jpg  

  7. #7
    Join Date
    Jun 2015
    Posts
    28

    Re: Breakout board power, Which Power pack?

    I was looking for one of these but i could not find one available for Australia. And few that i did find were over priced.
    But it's all good now, i'll just use the 5v2.5a power adapter that i have.

  8. #8
    Join Date
    Aug 2005
    Posts
    1091

    Re: Breakout board power, Which Power pack?

    This is the one I recommend for my breakout boards.
    https://www.homanndesigns.com/index....products_id=99

    Cheers
    Peter.


    Sent from my iPhone using Tapatalk Pro
    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com/store

  9. #9
    Join Date
    Jun 2015
    Posts
    28

    Re: Breakout board power, Which Power pack?

    I will bookmark this for my next CNC.
    Thanks

  10. #10
    Join Date
    Apr 2014
    Posts
    432

    Re: Breakout board power, Which Power pack?

    Yep that one 4 years down the track and still kicking

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