PS2 - Something, Something, Clamshell... (almost pre-final name)

Discussion in '2019 Summer Building Contest' started by Nold, May 13, 2019 at 3:17 PM.

  1. Nold ¯\_(ツ)_/¯ Staff Member . . .

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    Hi guys,

    this idea is very young (yesterday), so i don't have much to say right now... just wanted to make it official:
    DSCF8310.JPG

    Video will most likely be component, not VGA! i think my screen supports it.. (It's mst703-lf based).

    So no way turning back now >.<'' which me luck! Hope my PS2 trim doesn't die on me this time.. otherwise i will just throw a wii in there..
     
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  2. Nold ¯\_(ツ)_/¯ Staff Member . . .

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    Here's the first update.. the good news is - i know how i will (most likely) design the hinges!
    The bad news is, my ps2 trim isn't working... just like my first "standard" trim, it just doesn't turn on, when pressing reset.
    All the voltages seem fine, no shorts, 1.25V is drawing 0.8A & "the rest" 0.15A at 5V. the chips seem to get a little warm, just very slightly.

    i already reconnected a few traces, cause i think i might have trimmed a little to far on the edges of the small site.
    DSCF8332.JPG
    DSCF8333.JPG


    The setup is as follows:
    1.25v via PTR08060 or PSU
    1.75v via LDO at 3.3v
    2.5v via LDO at 3.3v
    3.3v via PTH08080
    5v via PSU (is it even required to boot?)

    I'll check if the voltages are available on all required traces tomorrow..
     
  3. Nold ¯\_(ツ)_/¯ Staff Member . . .

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    Thanks to Dr. G(man) the patient is back under the living:



    ... time to learn some kicad :rothink:
     
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  4. Papa J . .

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    I'm at the point of learning CAD software too. it's very disheartening.
     
  5. Nold ¯\_(ツ)_/¯ Staff Member . . .

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    I'm coming along fine with fusion so far.. even if it does weird stuff sometimes.. kicad is very different from eagle & somehow we didn't become friends, yet :D
     
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  6. Jano .

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    Hi, excuse me what linear regulator I use for the 1.75v line?
     
  7. Nold ¯\_(ツ)_/¯ Staff Member . . .

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    I recycled two wii LDOs, like this one: https://bitbuilt.net/forums/index.php?attachments/pq070xh02zxh_e-336951-pdf.5195/

    Here are my notes & resistor values i've used/calculated.. but you should calc your self, since idk if i might changed something in the end!:
    1.25v ~3.1A --> BIG PTR08060 --> 1.21v == 1.91k (may used 1.8k-ish)
    1.75v ~0.1A --> LDO (at 3v3) --> R1=3.3k ; R2=8.06k
    2.5v ~0.1A --> LDO (at 3v3) --> 10k & 10k / any, just use two times the same resistor value < 80k!
    3.5v ~0.1A --> 3.3v PTH --> 1.87k
     
  8. Jano .

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    Thank you, I was watching but I do not appear where I can get it, any alternative for this regulated?
     
  9. Nold ¯\_(ツ)_/¯ Staff Member . . .

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  10. Nold ¯\_(ツ)_/¯ Staff Member . . .

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    Alright, today was a quite productive day. cleaned up my flat, thought about my project & made some progress.

    I did some work on the mainboard, too. First i cleaned up the voltage relocation (so much to rewire >.< - wii's are so comfy)..
    DSCF8348.JPG
    Orange: 3v3, Green: 2v5 , Grey: 1v25, Red: 5v, White: 1v75

    Also i can pretty much confirm that my ZJ050NA screen is accepting the interlaced vga signal from the ps2 (Green should be cause the console is still set to component):
    DSCF8350.JPG

    All in all i think i'm coming along fine & i feel like i'm really taking my time with this project.
     
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