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  1. loveguru

    Electronic Stethoscope 2

    hi...audioguru........................ in e-scope-2 ckt u have told that tha cut-off frequency of lpf at u1b is 103 hz. now what is the frequency at hpf before u1a?/???????? we have used band-pass filter=lpf+hpf. ok? i wann the frequency responce of that.........i mean the lower...
  2. loveguru

    Electronic Stethoscope 2

    hi,........audioguru................ u r telling that the heartbeats freq.is 20-3- hz./................ but i counted it as 1.2 hz........... as the equation................ f=beats/seconds so..................................f=72/60...
  3. loveguru

    Electronic Stethoscope 2

    hi audioguru............. i have no words for your great help and supporting us.......... really thanx to you from bottom of the heart........ but still i have question ralted to ckt operation.... 1)what is the exectlly difference b/w HPF & LPF? 2)you have answered some one that without...
  4. loveguru

    Electronic Stethoscope 2

    hi.......audioguru............. tell me if i use 47 k pot instead of 10 k .then what wil happen? will i get the voice level more than that i have max. voice while using 10 k pot? i wann increse my max. output headphone volume level. what should i do? pls tell me fast....... ok bye...
  5. loveguru

    Electronic Stethoscope 2

    hi..................audioguru...................... i got my destination................ my circuit is working very well................ i can listen my heart-beat sound very well............. but........when i measure my friend's hearbts' .i can listen clearly what ever he speaks..i want to...
  6. loveguru

    Electronic Stethoscope 2

    hi audioguru and all others persons which are helping me, my circuit is working but not satisfactor.i can hear big sound(when i slightly speak to the mice) from my headphone but it is not able to catch heartbeat sound. actually till now i have tried on bread board in which connection bi default...
  7. loveguru

    Electronic Stethoscope 2

    Hi................audioguru............ i will try for taht mic. tha back-noice about which i was talkin is like:"shshshshshhhhhhhh" if we don't speak in mic.then it also created in head-phone. what should i do? Loveguru. and...
  8. loveguru

    Electronic Stethoscope 2

    HI.AUDIOGURU.......... I FORGOT TO TELL THAT WHEN I REMOVEV MY R11 POT......THEN I GOT MY OUTPUT........I DON'T KNOW IS IT CO-INCIDENTALY OR NOT? RECENTLY I HAVE NOT USED THAT POT BECOZ I THOUGHT THAT IS NOT WORKING PROPERLY. I HAVE USED ALL THREE COMPONENTS AS U ASKED IN LAST 3 Q. MY MIC. HAS...
  9. loveguru

    Electronic Stethoscope 2

    HI...........AUDIO GURU........ I HAVE NOT CHEKED THE VOLTAGES AS U TOLD...... I HAVE USED MY WALKMAN RECORDING MIC. I HAVE MADE MY CIRCUIT RUNNING .BUT.........I CAN'T LISTEN MY HEARBEATS FROM IT........ IF I SPEAK IN MIC.I CAN LISTEN IT FROM THE EAR-PHONE........... EVEN IF WE BLOW.I MEAN...
  10. loveguru

    Electronic Stethoscope 2

    hi audioguru, it is somewhat good news that when i connected 47 microf capa. instead of 47nf when i speak to mice(whose voice is very high compared to our heartbeat), led alternating indicating red and green light. but still i m not hearing any type of sound from my ear phone. is there any...
  11. loveguru

    Electronic Stethoscope 2

    hi audioguru, i gone through your advice but still not getting responce. what should be the fault i cant understand. i go through each stage stape by stape everything is ok. but not getting ckt to be run. ??? only 2 days for me. i have connected 47 microf insted of 47 nf but led still glowing...
  12. loveguru

    Electronic Stethoscope 2

    hi audioguru, i have completed the circuit of e scop- 2. but it is not working. led indicating only one light at a time. one problem created that the ic tl072 has gain 21(which i have purchesed) but it is giving arrond 70.is it fault? what shuold be actual gain? i have reconnected ckt but still...
  13. loveguru

    Electronic Stethoscope 2

    HI..............SURAJ.........THANX 4 REPLY. LOVEGURU.
  14. loveguru

    Electronic Stethoscope 2

    HI...AUDIOGURU.... THANX 4 REPLY. LOVEGURU.
  15. loveguru

    Electronic Stethoscope 2

    HI.AUDIOGURU.I HAVE STARTED TO MAKE E-SCOPE-2. ON MY IC ,IT IS WRITTENED"TL072CP". IS IT OK??????????? PLEASE REPLY ME SOON. AND ALSO TALL ME THE DIFF. BITWEEN THOSE 2. BYE. LOVEGURU.
  16. loveguru

    ABOUT VEROBOAD

    HI.................AUDIOGURU. I HAVE GOT ALMOST ALL COMPONENTS. BUT WHAT WILL BE SIZE OF MY VEROBOARD? AND I WANN THE PHOTOGRATH OF YOUR WORKING MODEL. PLEASE GIVE ME THE REPLY SOON. AND I WANN THE LENGTH OF MIC'S SHIELDED CABLE? I HAVE TAKEN 1 METRE. IS IT ENOUGH? OK. BYE...
  17. loveguru

    Electronic Stethoscope 2

    hi,audioguru, thanks for reply.i got the ic TL072.But i dont no the difference between dual opamp and odinary opamp. i 've linear volume controller.you had suggested me to convert it to logarithmic by joining 3.3k resistance from slider to ground please give detailed idea about it. i have an...
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