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Thread: Benchtop Power supply

  1. #1
    Supporting Member Christophe Mineau's Avatar
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    Christophe Mineau's Tools

    Benchtop Power supply

    Yes, I know,
    yet another bench top power supply, made from a refurbished PC power supply...

    So here is mine :

    I just recall the principle :
    - gather all the same voltage / same color wires, distribute them across several banana sockets if you prefer
    - put the ATX "PS-ON" (sometimes Gray or green) wire to ground in order to start it up
    - Ideally, if you want more stability, put a permanent load : A 5W 5V resistor on the 5V output, will draw 1A permanently.
    - If you wish : add a power on LED ex : ~300 ohm in serial with a Red LED wired on 5V output.

    The performances are quite impressive :
    for this 400W power supply, it can deliver :
    5V : 35 A
    12V : 15 A
    3.3V : 22A
    less impressive but still useful to have :
    -5V : 0.5 A
    -12V : 0.8 V







    186 More Best Homemade Tools eBook
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    Christophe
    ________________________________________________________________
    Visit my Website : http://www.labellenote.fr/
    Facebook : La Belle Note
    All my personal works, unless explicitly specified, are released under
    Creative Commons BY-NC-SA license.

  2. The Following 8 Users Say Thank You to Christophe Mineau For This Useful Post:

    Jon (Jan 31, 2020), Komo (Sep 30, 2017), Paul Jones (Oct 5, 2017), piper184 (Jul 5, 2023), Rangi (Jan 29, 2020), rlm98253 (Sep 28, 2017), Seedtick (Sep 28, 2017), Sleykin (Feb 12, 2020)

  3. #2
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    Thanks Christophe Mineau! We've added your Benchtop Power Supply to our Power Supplies category,
    as well as to your builder page: Christophe Mineau's Homemade Tools. Your receipt:




    2000 Tool Plans

  4. #3
    Solextract's Avatar
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    Solextract's Tools
    But, it's such a great solution for when you need low voltage DC with high amperage! I use one to power my LED strips. ...because I like to play with 50 ft of neopixels at a time.

    You did a great job designing yours.. and providing documentation for others to follow. I think people are going to find this really helpful .

    I don't get the final picture.. you have DMM included, but it's turned off. You have a light plugged in and turned off. It's like you wanted to demonstrate it, but changed your mind.

  5. #4
    Supporting Member Christophe Mineau's Avatar
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    Christophe Mineau's Tools
    Quote Originally Posted by Solextract View Post
    But, it's such a great solution for when you need low voltage DC with high amperage! I use one to power my LED strips. ...because I like to play with 50 ft of neopixels at a time.

    You did a great job designing yours.. and providing documentation for others to follow. I think people are going to find this really helpful .

    I don't get the final picture.. you have DMM included, but it's turned off. You have a light plugged in and turned off. It's like you wanted to demonstrate it, but changed your mind.
    Hi ,
    thanks for your message !
    No the last picture was just the only one I had kept with the box closed and LED turned on.
    Actually, I was setting up my last project which is the wildelife camera on the left, but the photo was just to show the power supply.
    I should have cropped it ;o)
    BR
    Christophe



    186 More Best Homemade Tools eBook
    Cheers !
    Christophe
    ________________________________________________________________
    Visit my Website : http://www.labellenote.fr/
    Facebook : La Belle Note
    All my personal works, unless explicitly specified, are released under
    Creative Commons BY-NC-SA license.

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