Electronic stethoscope

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

  1. jayshree31

    Thread Starter New Member

    Feb 23, 2011
    6
    0
    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
    15,815
    282
  4. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,648
    764
    Good enough to find a place where to use the OLD and LOUSY 741!! :D
     
  5. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    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

    New Member

    Dec 20, 2007
    9,411
    896
    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
    2,613
    214
    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
    6
    0
    hey i want brief description pls give me i m using 741 op amp
     
  9. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    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.
     
Loading...