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Thread: Buildup of Charge?

  1. #1
    Variable Bitrate Fox_Mulder's Avatar
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    Buildup of Charge?

    heres my scenario:
    I have a laptop powered of a dc-dc power supply (targus auto/air adaptor) (wired to the batt)
    I have a 3.5" HDD that connects to the laptop via a IDE->USB adaptor.
    I have a 150W Inverter (wired to the batt).
    The 3.5" HDD gets it's power from a 240v->12v,5v,0v transformer.
    Today I was powering up the system and the USB HDD wasn't recognised in Windows which I thought was strange seeing as it was powered up and the usb plug was in. So I unplugged the usb cable and plugged it back in - nothing. I un plugged but this time as i go to plug it in ZAP! I felt very tingly in the fingers and immediately dropped the usb cable. So now I am thinking the inverter might be trying to ground through the USB Cable.
    So I turned everything off, grounded the inverter again, and again power up the system. This time the hdd is detected fine in windows and there is no nasty zap comming from the usb cable. About 5 mins later, I was holding the hard drive in my hand whilst navigating in frodoplayer and suddenly I could feel tingly - slightly and as a couple of seconds went by it felt as if it was getting stronger so I immediately placed the hdd on the ground then slowly brought my hand to pick it up, but there was no sign of the tinglyness anymore. Very strange.
    Anyone know what it could be?
    Fox Mulder
    2004 Toyota MR2
    Intel Dual Core 2.0Ghz 1Gb DDR2 160GB SATA2 M4ATX Xenarc 700TSV TS BU353 DiNovo Mini Car2PC ODBII Bluetooth HF 16x2 Character LCD

  2. #2
    Variable Bitrate Fox_Mulder's Avatar
    Join Date
    Apr 2004
    Location
    Melbourne, Australia The Truth Is Out There
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    It also happens inside the house when the thing is powered from the mains...
    Fox Mulder
    2004 Toyota MR2
    Intel Dual Core 2.0Ghz 1Gb DDR2 160GB SATA2 M4ATX Xenarc 700TSV TS BU353 DiNovo Mini Car2PC ODBII Bluetooth HF 16x2 Character LCD

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