python program

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  • skystormfarms
    Banned
    • Mar 2011
    • 160

    #1

    python program

    i was using a controller off the parallel port running a python program switching the speed of a 5 speed fan when the computer crashes and i look at the psu and i am getting an ac sine-wave along with the dc signal and extra 3v to on all lines how can this happen
  • ratdude747
    Black Sheep
    • Nov 2008
    • 17136
    • USA

    #2
    Re: python program

    could you translate that from gibberish to english?

    I assume you speak more than just gibberish?
    sigpic

    (Insert witty quote here)

    Comment

    • shadow
      Badcaps Veteran
      • Feb 2007
      • 732
      • Australia

      #3
      Re: python program

      Seems to make sense to me.
      However I am unsure why that would happen.

      Comment

      • dood
        Deputy dood
        • Mar 2004
        • 2462
        • USA

        #4
        Re: python program

        Originally posted by ratdude747
        could you translate that from gibberish to english?

        I assume you speak more than just gibberish?
        It's not gibberish, it's just a lack of punctuation. Add your own.

        "I was using a controller off the parallel port (running a python program switching the speed of a 5 speed fan), when the computer crashes. I look at the psu, and I am getting an ac sine-wave along with the dc signal and extra 3v to on all lines. How can this happen?"
        Ludicrous gibs!

        Comment

        • Toasty
          Badcaps Legend
          • Jul 2007
          • 4171

          #5
          Re: python program

          Assuming a line voltage fan, yes?

          Did the PSU fail and cause the system crash?

          Is the AC present when the PSU is by itself? i.e.- Disconnected from system?

          Did the controller isolation fail somehow? Would that allow AC back to the system?

          Can you diagram the setup?
          veritas odium parit

          Comment

          • skystormfarms
            Banned
            • Mar 2011
            • 160

            #6
            Re: python program

            well toasty the hard drive is toast it was a digital diagram on one 3TB drive only
            Last edited by skystormfarms; 07-22-2011, 11:34 AM.

            Comment

            • Toasty
              Badcaps Legend
              • Jul 2007
              • 4171

              #7
              Re: python program

              Ok

              ....and the other questions?
              veritas odium parit

              Comment

              • skystormfarms
                Banned
                • Mar 2011
                • 160

                #8
                Re: python program

                yes a line voltage fan
                yes the PSU fail cause the system crash
                yes there was AC present on the PSU is by itself(Disconnected from system)
                no it use magnetic relays

                Comment

                • kaboom
                  "Oh, Grouchy!"
                  • Jan 2011
                  • 2507
                  • USA

                  #9
                  Re: python program

                  Was this power supply plugged in when the pole transformer went kaboom?

                  The power supply you're talking about- does it power just the computer or does it also provide the control power? How are you interfacing the parallel port to the relay coils? Probably one bit per relay coil, via some 2N2222 transistors...

                  On your 5-speed line voltage fan, make sure your program is set to drop one relay before picking up another- don't want more than one speed tap energized at once.

                  Curious about the motor- multi-tapped shaded pole or PSC?

                  -Paul
                  "pokemon go... to hell!"

                  EOL it...
                  Originally posted by shango066
                  All style and no substance.
                  Originally posted by smashstuff30
                  guilty,guilty,guilty,guilty!
                  guilty of being cheap-made!

                  Comment

                  • skystormfarms
                    Banned
                    • Mar 2011
                    • 160

                    #10
                    Re: python program

                    yes this power supply was plugged in when the pole transformer went kaboom
                    yes it drops one relay before picking up another
                    yes one bit per relay coil via some 2N2222 transistors
                    and its a multi-tapped shaded pole

                    Comment

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