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[[[help !!!]]] I'm dying to know how can this happen (Problem with ECG design)

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by 31023102, Jul 26, 2011.

  1. 31023102

    31023102 New Member

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    This is the output signal for my 3-lead ECG design. (it's acquired by hardware, not simulation)

    um...and it doesn't seem right, i m dying to know what happened, and the potential way to correct that.

    Thank u in advance
     

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  2. Roff

    Roff Well-Known Member

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    How do you expect us to diagnose the problem when we don't have a schematic?
     
    Last edited: Jul 26, 2011
  3. Roff

    Roff Well-Known Member

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    I guess he died. I should have tried to come up with an answer.
     
  4. dave

    Dave New Member

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  5. alec_t

    alec_t Well-Known Member Most Helpful Member

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    The OP doesn't have a name; just a number. Maybe the trace isn't of human origin, so it could be perfectly ok ;-)
     
  6. audioguru

    audioguru Well-Known Member Most Helpful Member

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    It is 60Hz mains hum because he didn't use the "right leg anti-common-mode noise rejection" circuit in a datasheet for an instrumentation amplifier. Maybe he didn't use shielded audio cable.
     
  7. alec_t

    alec_t Well-Known Member Most Helpful Member

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    Well the trace has certainly got a dominant 60Hz component. If that's a human heart-rate then the patient sure is in trouble!
     
  8. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    Looks like a florescent light output waveform.

    PS (alec_t): Loved the number comment
     
  9. audioguru

    audioguru Well-Known Member Most Helpful Member

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    I betcha the circuit is built on a breadboard with lots of too-long antenna wires which pickup mains hum.
     

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