Ideas Test

29 VOTE

Logic should be electrically isolated from the PC

The user should not have to worry about ground loops.

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • Jun 26 2018
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  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45
  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    I would recommend Saleae sale an add-on for this. I can see extra costs especially if you design this correctly. If you make all the channels isolated from each other (like a bunch of differential probes) that can be costly but may be necessary for some people.

    I believe it should be very easy to plug in an add-on to the existing 100mil connectors of the pods.

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    Running it from a laptop does not solve the issue - if you are testing high voltage equipment (like an electric utility meter) and using an isolation transformer, the potential can be brought through the ground rail of the USB to the notebook casing... brushing against the "neutral" casing of the load on the meter and your notebook will give you a jolt. I speak from personal knowledge.

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    Why does someone not make a USB3 to optical to USB3 to isolate?

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    Just run it from a laptop! I'm doing that anyway because it is more convenient on my bench

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    External opto kit is the easiest solution.

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    Surge protection also important for instruments.
    ESD (TVS), EMI/RFI (ferrit bead/ring) on USB.

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    There are USB optoisolators, maybe sell them separately.

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    Good feature, if any groups of inputs will be isolated individually. But I think it is too difficult and expensive to do that for analog channels.

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    26 Jun 19:45

    You could try USB Isolator chip like this: http://www.ebay.com/itm/like/251485526057