Recent content by xoy

  1. xoy

    AudioGURU and others... help me!!!!

    hi again audioguru!! I have already sighted the article section. Thanks! it is definitely a big help,.. hahaha, Im going back to school again.. I have not been reading nor been in the environment for a year and a half that's why I almost forgot my lessons back from my school years.. I may ask...
  2. xoy

    AudioGURU and others... help me!!!!

    Hi audioguru!! I am really interasted to pursue a career in designing end developing circuits. As an ECE graduate, I have basic knowledges regarding electronics and the components. My problem that I want consult you is my problem in designing and developing circuits, like for example, timers...
  3. xoy

    Electronic Stethoscope

    HI EVERYONE!!! JUST ASKING ONLY... HOW DOES THE CUT-OFF FREQUENCY OF 20-30HZ AT THE FILTER WAS COMPUTED??? CAN ANYONE PLEASE PROVIDE EQUATIONS FOR IT... THANKS.... -------------XOY---------------
  4. xoy

    digital elec-stetho..

    But you have only part of a filter since its R5 is missing. It will oscillate like that. reply:  A.... sorry.. i now put the R5... If their values aren't the same then the filter will be messed-up with a droopy response or a peak and oscillation. If their values are less than 1k then opamps...
  5. xoy

    9v to 6v DC/DC Converter

    hi audioguru, :odoes it mean, i can supply the electronic stethoscope2 with a positive and negative 6volts supply? whewwwwwww!!!!! so there is no need for me to have a converter??? maybe it is better for me to use 6vacdc adapter... i will only add what Alun advice me to have a -6v supply.. (at...
  6. xoy

    digital elec-stetho..

    thanks audioguru... now i can have a better discussion with you now... answer at #1: you adviced me before to have a 2nd Ub1 stage, so i put it after the first Ub1 and before optional stage... answer at #2: i use trimmers intead of resistors so i can easily adjust the frequency.. answer at...
  7. xoy

    digital elec-stetho..

    hi again!!! i ask my teacher for that beeps, but he is really forcing me to have an output in an LED display.. i have simply just design two circuits here, but this really needs any corrections... can you please help to get through this... thanks!!! i get the circuit of the counter and the...
  8. xoy

    sphygmomanomater.

    hi!! what kind of microprocessor is used in the Omron automatic blood pressure monitor???
  9. xoy

    9v to 6v DC/DC Converter

    hi!! what kind of diode?? is it s silicon diode?
  10. xoy

    9v to 6v DC/DC Converter

    hi audiouru!!! i will going to use that on a digital sphygmomanometer which has a 6v input... it will be acompanied with another circuit which has a 9v input... is there still any way for this?? --thanks!!! ----xoy---
  11. xoy

    Electronic Stethoscope

    it is marked 473.. so it means it is ok to use... thanks!!!
  12. xoy

    digital elec-stetho..

    hi audioguru!!! i know, i should have learn more.. maybe thats a better idea.. how can i properly make it beep!?? which only beeps on heart beats... thanks!!!
  13. xoy

    9v to 6v DC/DC Converter

    hi!!!! can anyone help me please how can i convert a 9v from battery to 6 volts supply.... please post a circuit.. thanks.....
  14. xoy

    Electronic Stethoscope

    hi!!! i cant find the 0.047uF/50V Metalized plastic-film Capacitor, instead i buy the  mylar capacitor with that same values... is it okay???
  15. xoy

    digital elec-stetho..

    hi audioguru, alun, and other eletcronic gods there.... i know this is another topic to be discussed in the part of electronic stethoscope so why i build this new page... due to financial problem, i was seldom replied in some of of my discussion about some of my questions.. in the other page...
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