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  1. P

    Electronic Stethoscope

    Hi all, Hi audioguru... I have tried the modified circuit, but sadly it didnt work for me. I need to clarify one thing in the circuit. IS pin 4 of u5 (lm386) ground or connected to the -9 volt  supply. Some of the post in forum have suggested to connnect pin 4 to the -9 volts. why would that...
  2. P

    Electronic Stethoscope

    Hi audioguru, :) I have made the changes which u had recommended, i have breadboarded the circuit exactly according to ur circuit diagram.  My professor at uni has given me a OMNI-DIRECTIONAL ELECTRET MICROPHONE INSERT.. he is suggesting me to insert microphone in the bell of the sthehoscope...
  3. P

    Electronic Stethoscope

    Hey Guys..hi audio guru ;D Iv just completed my tests for this week. last night i was simulating the circuit#2, i have simulated exactly according to ur modified circuit..i.e circuit#2. The only difference was during simulations i have used LM741 instead of lm386. I provided a sinewave signal...
  4. P

    Electronic Stethoscope

    G'day guys... Hi audioguru, hello everyone... As per ur suggestion i will try with circuit2. I was getting bit confused with so many circuits flying around in this forum..iv got test this week but i am confident that by next monday i should be able to breadboard the circuit ...i will keep u...
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    Electronic Stethoscope

    Hello Everyone. This is my fist message to the group. I am currently workin on builiding a blood pressure monitor as my final year project. For the first sem i had used oscillometric method to measure the blood pressure. Luckly i was successfull in doing that...and got very good marks for...
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