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WHAT DO I DO WHAT DO I DO WHAT DO I DO WHAT DO I DO WHAT DO I DO Power Good

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  • WHAT DO I DO WHAT DO I DO WHAT DO I DO WHAT DO I DO WHAT DO I DO Power Good

    How do I get the power good line???
    my mobo needs it...

  • #2
    HELP

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    • #3
      HELP!!!!

      Comment


      • #4
        first: be patient, it's a friday night/saturday morning and some of us actually have lives

        second: the power good line is +5volts.


        try and be a little mor epatiwent next time

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        • #5
          Sorry for being inpatient...
          Umm...
          that is not so...
          The power good line is a 100-500milisecond pulse of five volts...
          I think, well, that's what this website said....
          just conecting 5volts doesn't work....

          Comment


          • #6
            Step A:
            Try 5 volts and see if it works,

            Step B:
            use a cap and a resistor with the resistor tied to +5 and the minus side of cap tied to ground and the middle of them is the power good signal.


            Step C:
            use a buffer chip or 2 inverters with the R and C in the same manner.

            Remember, T = R*C
            Thats time equals Resistance times capacitance. wooo hooo!


            Jeff_
            MPEGBOX - Plexiglass Computer
            www.mpegbox.com

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            • #7
              I will try STEP B, but I don't think it will work......
              Hmm...
              any more ideas??

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              • #8
                Hi Again SKINNY,
                The cap and resistor work just fine. That is what I have. Use a 1MEG resistor and a 1uF cap for a TC of 1 second.
                mike

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                • #9
                  Hey give the kid a break. My mobo didnt work even with a resistor+cap. In the end I needed to use and opamp to square up the pulse.

                  Somebody else asked for the circuit. I'll post the diagram when I get back home after this weekend.

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                  • #10
                    How does a resistor and a capatitor give a pulse????

                    Comment


                    • #11
                      build a simple 555 timer, that will do the trick. Seems like ur mb is like one of those PCChip 586LMR or so...
                      abcd-1
                      Author of CobraI,II,III and now CobraIV.
                      You can contact me on AOL instant messenger....nick is cenwesi or cenwesi3

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                      • #12
                        Here is the schematic for my power good circuit. I haven't checked the diagram all that well(drawn in paint). This is the circuit I needed to get my board going.

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                        • #13
                          well, I'll try that circuit, and my mobo is an old P75, It doesn't have anything inbuilt not even the controller card, to play mp3s I have to have atleast 2 cards plugged in, yeah, just thought you might like to know....

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                          • #14
                            What does this circuit do????
                            I found it, and it is supposed to be a power good circuit.... Is this what I want???


                            [ 07-16-2001: Message edited by: THE_SKINNY_MP3_KID ]

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                            • #15
                              Originally posted by THE_SKINNY_MP3_KID:
                              <STRONG>How does a resistor and a capatitor give a pulse????
                              </STRONG>
                              It forms what is called an "RC circuit". The simplist of all timer. The circuit outputs a pulse as the capacitor charges through the resistor. It is much more like a very long single triangle wave than anything else, but seems to work for power good.
                              Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
                              Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
                              "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

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