Recent content by t_ang41

  1. t_ang41

    Electronic Stethoscope

    :)Thank you very much to all who replied to this forum. Though I am very slow to complete this apparently simple project, I still failed to make it work. I have tried achaila's method of inverting the polarity of the MIC (I do not know what model it is... it is a tiny one around 5mm in...
  2. t_ang41

    Electronic Stethoscope

    Hey, achaila! That was exactly what I got also from your description of those problems. Thanks also to mozikluv help that I managed to reduced the annoying external noise a little bit, by reducing the length of the wires connecting the MIC and phone jack. However there is still lots of...
  3. t_ang41

    Electronic Stethoscope

    Thank you for the kind reply, Mixos. Since I could only construct this circuit weekly, I could only tell about the problems i faced weekly. I feel that the circuit is progressing slowly. 1. Thanks to Mixos guidance, I am able to get an audible output by fixing the phone jack correctly. I could...
  4. t_ang41

    Electronic Stethoscope

    This is the circuit:
  5. t_ang41

    Electronic Stethoscope

    I am very interested to build the electronic stethoscope found in this website under 'Scientific'. However, I have quite a number of difficulties. 1. Is the connection of the U2 correct? I mean I was not sure if there should be a feedback from the output of U2(pin 6). Since all the op-amp has...
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