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Subject:   Could the problem be a faulty ground?
Date:   2003-07-05 21:07:00
From:   anonymous2
Response to: Re: Connecting iSight to a PC

A random friend told me that the horiztonal synch problem could be caused by a faulty ground.


The power supply has only two plugs, not three.
Could this be the cause of the flicker and/or the boriztonal bar of the top of the picture appearing in the bottom?


I don't know enough about the pins of a two-prong outlet for power. Warren, do you think I should making certain that some extra lines are grounded by hand?


Scott

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Showing messages 1 through 4 of 4.

  • Could the problem be a faulty ground?
    2004-01-02 19:10:27  anonymous2 [View]

    I have no idea about how well an iSight will perform on a PC, but the top line appearing on the bottom very well could be ground related - though it could be driver related as well. In a power connection with three leads like you see in AC power outlets, everyone knows that the two mains are alternating 120V 60Hz, and the third is a ground. In two-leads household outlets, they were polarized, rather than having a ground. Firewire doesn't resemble either of these, namely because it is DC, not AC. In DC, you have a positive and a negative. Electricity flows from the negative to the positive. However, voltage irregularities, or RFI and EMI interfernce can pollute the electrical signature enough to affect an image - but I'd say drivers were to blame if the problem was a smooth straight consistent line from the top appearing on the bottom. Otherwise, it would not follow a precise regular pattern of distortion like that.
  • Could the problem be a faulty ground?
    2004-01-02 19:10:16  anonymous2 [View]

    I have no idea about how well an iSight will perform on a PC, but the top line appearing on the bottom very well could be ground related - though it could be driver related as well. In a power connection with three leads like you see in AC power outlets, everyone knows that the two mains are alternating 120V 60Hz, and the third is a ground. In two-leads household outlets, they were polarized, rather than having a ground. Firewire doesn't resemble either of these, namely because it is DC, not AC. In DC, you have a positive and a negative. Electricity flows from the negative to the positive. However, voltage irregularities, or RFI and EMI interfernce can pollute the electrical signature enough to affect an image - but I'd say drivers were to blame if the problem was a smooth straight consistent line from the top appearing on the bottom. Otherwise, it would not follow a precise regular pattern of distortion like that.
    • Could the problem be a faulty ground?
      2004-12-07 16:03:25  GerryJMcF [View]

      I got my iSight working (no mic of course) using an adaptec AFW-1430 firewire adapter and a Radio Shack 12V 1500mA power supply. I also used
      IC Capture from www.imagingcontrol.com to adjust the settings. Cancel out of the new hardware wizard and the iSight will show as a generic 1394 canera in my computer. (This was discussed earlier here on this site) Cost? About $65 (plus iSight of course) Result? A very very good picture!
    • Could the problem be a faulty ground?
      2004-12-07 16:03:01  GerryJMcF [View]

      I got my iSight working (no mic of course) using an adaptec AFW-1430 firewire adapter and a Radio Shack 12V 1500mA power supply. I also used
      IC Capture from www.imagingcontrol.com to adjust the settings. Cancel out of the new hardware wizard and the iSight will show as a generic 1394 canera in my computer. (This was discussed earlier here on this site) Cost? About $65 (plus iSight of course) Result? A very very good picture!

Showing messages 1 through 4 of 4.