Unsure how to connect scope probes to DUT with no ground points.

Discussion in 'The Projects Forum' started by neko_whisker, Jan 12, 2012.

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  1. neko_whisker

    Thread Starter New Member

    Jan 12, 2012
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    Hi I was stumped for a moment. Please refer to the circuit diagram:- AC Power Light Dimmer/Motor Controller
    This is my first time, not knowing how to test this circuit with my oscilloscope with no ground point.
    Because this circuit has no ground point. Please advise how I can perform it correctly.
    The circuit is working but I wanted to learn more about the working of this circuit.
    Thanks in advance.

    Clement
     
    Last edited by a moderator: Jan 12, 2012
  2. hgmjr

    Moderator

    Jan 28, 2005
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    Here is your schematic as a PNG attachment.

    hgmjr
     
  3. MrChips

    Moderator

    Oct 2, 2009
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    Testing live AC mains circuitry requires expert knowledge. This is not a task for an amateur for safety reasons. Besides it violates the Terms of Service of this forum.

    If a dimmer circuit fails, quite often just replacing the triac will rectify the problem.
     
  4. hgmjr

    Moderator

    Jan 28, 2005
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    Thanks MrChips for pointing out the TOS violation.

    Thread locked.


    hgmjr
     
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