(Topic ID: 261774)

Rottendog Power Driver Board Question


By dmesserly

6 days ago



Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 1 day ago by dmesserly
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    #1 6 days ago

    I have a new PD board that makes a quick descending hum about 1 second long when I shut the game off. Its done this in another game as well.

    I also recall this happening in a game I had a few years ago that I think had an RD board.

    Is this usual behavior?

    Thanks.

    #2 3 days ago

    Bumping to see if anyone has any thoughts or info on this.

    Thanks.

    #3 3 days ago

    My new RD board I just bought does the same

    #4 3 days ago

    Piezoelectric effect from capacitors? I have had an original sound board with a singing ceramic disc capacitor. If you listened close you could even hear similar noise that was coming out the speaker at the same time.

    Some switch mode power supply circuits make noise when the power is turned off. Seems like the regulator is kicking out of normal frequency repeatedly as the capacitors drain out and an audible clicking noise is heard for a few sounds. If its fast enough i guess it would be a hum. I have some 12v power supplies for LEDs that do this at power down.

    I wouldn't worry much about it.

    #5 1 day ago

    Thanks for the info

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