Taking ECG from Electrodes

Discussion in 'The Projects Forum' started by pvjoshi28, Feb 18, 2011.

  1. pvjoshi28

    Thread Starter New Member

    Dec 10, 2010
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    Hello, I am designing ECG amplifier, in which I have to take ECG from patient. Electrodes I am using are clip type electrodes which are used in academic courses. I am getting some signal but it is not exactly ECG. How do I acquire nearly ECG signal using the electrodes?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    What circuitry are you using? Can you post the schematic of it?
     
  3. pvjoshi28

    Thread Starter New Member

    Dec 10, 2010
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    I have used INA 122 as Instrumentation amplifier and OPA 335 for Band Pass Filter. I am not able to get ECG properly. What do I do?
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
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    Hard to tell what you are doing without a schematic.
     
  5. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
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    I sure hope all these ECG projects are just student projects and not used by actual doctors.
     
  6. reshin

    New Member

    Oct 6, 2011
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    Hello, im doing ECG circuit for my course project. As they said, can u share the schematic design? Do the clamp type electrodes is effective collecting the heart pulse?
     
  7. Adjuster

    Well-Known Member

    Dec 26, 2010
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    There are, or should be, very strict rules about this even if the prospective "patient" is the student him/herself. Would this even be legal say in the UK or USA? ECG electrodes are deliberately placed on parts of the body where it would be particularly dangerous to receive electric shocks.
     
  8. paulktreg

    Distinguished Member

    Jun 2, 2008
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    If the OP is using DC power derived from the mains without suitable isolation barriers then I suppose there's the remote possibilty of harm. ECG preamps are isolated from the ECG processing electronics using opto-couplers, transformers, etc.
     
  9. saturation

    Member

    Dec 21, 2008
    22
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    The basic EKG is over 100 years old. It requires a differential amp input to offset all EMI and noise, the better the CMRR of your op amp the better; you must use skin conductive gel and conductive pads, otherwise any wire will do. This is a standard exercise in some schools, you can find the entire input circuit easily via google.
     
  10. t06afre

    AAC Fanatic!

    May 11, 2009
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    Actually this is a hi-jacked thread. And both the OP or the hi-jacker seems not interested in following up
     
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