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    #1

    Function generator power on/off damaging output pulse

    http://youtu.be/1Ljz2ZSJoC4
    I had a close call there , and it could affect other function generators as well.
    My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.
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    #2
    Re: Function generator power on/off damaging output pulse

    i have no sound on this pc, what voltage was that wave-pulse?
    and did it go negative first like it looked on the scope?

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      #3
      Re: Function generator power on/off damaging output pulse

      That was 12 volts power-on and 17 volts power-off.
      Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

      My computer doubles as a space heater.

      Permanently Retired Systems:
      RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
      Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


      Kooky and Kool Systems
      - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
      - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
      - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
      - Main Workstation - Fully operational!

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        #4
        Re: Function generator power on/off damaging output pulse

        I believe this happen in lots of generators unless it has output relay that drops out when unit is powered off kind of like audio amplifier with speaker protection relays.
        The output amplifier just putout pulses when power is removed.
        Attached Files
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

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