Electronic stethoscope

Discussion in 'The Projects Forum' started by jayshree31, Mar 7, 2011.

  1. jayshree31

    Thread Starter New Member

    Feb 23, 2011
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    hey i dnt knw abt electronics stethoscope hw it works? cn any 1 tel me?
     
  2. jayshree31

    Thread Starter New Member

    Feb 23, 2011
    6
    0
    pls send me on my email <snip> i want brief discription

    Moderator's note: Please keep all questions and answers n the public forums.
     
    Last edited by a moderator: Mar 7, 2011
  3. beenthere

    Retired Moderator

    Apr 20, 2004
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  4. atferrari

    AAC Fanatic!

    Jan 6, 2004
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    Good enough to find a place where to use the OLD and LOUSY 741!! :D
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    You've been hanging around AudioGuru too much.

    You can find a much better op amp in the form of a TL082 from Radio Shack. Just ground the unused inputs.
     
  6. Audioguru

    AAC Fanatic!

    Dec 20, 2007
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    I used the lousy old 741 opamp to blink the LED.
    I used a TL072 dual low noise audio opamp as the preamp and lowpass filter. An LM386 power amp IC drives the headphones.
     
  7. tom66

    Senior Member

    May 9, 2009
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    Hey the 741 still has uses... I use them to prop up my bookshelf!



    (In all seriousness, it's a very common op-amp in education, though I'm glade we're now taught using a TL082 which is closer to an ideal op-amp, but still a long way off.)
     
  8. jayshree31

    Thread Starter New Member

    Feb 23, 2011
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    hey i want brief description pls give me i m using 741 op amp
     
  9. Audioguru

    AAC Fanatic!

    Dec 20, 2007
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    What do you want a description of?
    What are you using an old 741 opamp to do?

    The Electronic Stethoscope project has a description of its circuit at www.aaroncake.net and at www.electronics-lab.com .
    I used a dual low noise audio opamp a TL072 for the preamp and lowpass filter IC, an LM386 for the power amp and a 741 to flash the LEDs.
     
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