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  1. steven2

    seeking parabolic mic circuit

    :)
  2. steven2

    seeking parabolic mic circuit

    :)i cant find the microphone amplifier circuit i posted before, its somewhere in the forums but hear it is in biult form with the electret microphone allready in the spotlight dish i used and this time i rebiult the circuit and its working good but i want to increase the microphones sensitivity...
  3. steven2

    Playing with hydrogen

    thanks dazza my prototype setup would produce hydrogen and oxygen slowly at a pressure enougth to inflate 2 baloons as ill use them to collect the gass . and by the use of a flateable baloon puffer switch once the baloons inflate the circuit will shut off, ive got the plans for these puffer...
  4. steven2

    big ear, fm transmitter.

    :)audio guru ive seen that head banger site but when i look at circuits the first thing that gets me is some of the parts are hard to get and ive never herd of some
  5. steven2

    big ear, fm transmitter.

    thanks audio guru now i just need a headphone amplifier to amplify the output sound a good battery operated one
  6. steven2

    big ear, fm transmitter.

    :)audio guru i got that other circuit working, the one that you recamend i put a 10uf electro across from pin 8 of the lm358 ic to pin one to increase the gain, well ill exsplain first, i decided to rebiuld it from scratch and it worked good before i put the 10 uf electro in and it still works...
  7. steven2

    big ear, fm transmitter.

    oops ive uploaded the wrong circuit but i geuss it may come in handy
  8. steven2

    big ear, fm transmitter.

  9. steven2

    big ear, fm transmitter.

    audio guru this page took a long while to come up ,when i clicked on reply, jaycar is www.jaycar.com.au to view there online catalouge. with bills to pay it would be a few weeks before i can order that kit of the parabolic mic , so as soon as i do ill upload or email you the circuit...
  10. steven2

    big ear, fm transmitter.

    :)the first time i had the big ear working good was some time ago when i first biult it and the analouge radio headsets were great at picking up distant sounds really good and clear, even barking dogs ,cats to in the distance, but now i think ordering a parabolic mic circuit from jaycar will be...
  11. steven2

    big ear, fm transmitter.

    i had the feeling it was the pushbutton digital radio as i only got it working for a short time, originally before i used an analoge radio head phones with ereal and it worked good but now there seems to be few and far between and i have to try find one again
  12. steven2

    big ear, fm transmitter.

    :)im haveing troubles in getting the bigt ear working again, this time the first one i biult went ok really good useing radio headphones to tune to it with but since then ive not botherd useing it again for a while so i biult the second one as shown ands it worked for a little but kept droping...
  13. steven2

    Electronic Stethoscope 2

    :)did i make a few erors when i redrew your circuit audio guru i posted a big ear circuit recently but it suddenly stoped working again, it used to work good but i had to use a radio to receave it but id rarther something that can do it without the transmitter
  14. steven2

    Electronic Stethoscope 2

    audio gurus electronic stephescope 2, audio guru ive redrawn it so its simpler to biuld be all gronds are grounded and ive linked one of the postive inputs from the first ic, to the second post input ive put letters ab and c near r11 so which ones or is it the ground or the wire before that...
  15. steven2

    Electronic Stethoscope 2

    :)audio guru ive got a printout of your electronic stephescope 2 circuit, thats the one that works insent it, anyhow which part of r11 do i run to pin one of the tlo72 ic to make it into a good parabolic microphone circuit , is it the ground wire or the wire before that ,that goes to the...
  16. steven2

    Electronic Stethoscope 2

    thanks audio guru i wait patiently to read your postings its better than the news papers, electronics lab is lucky to have you as a member and electronics god , your our exspert on this matter of audio electronics and other things hence the name audio guru
  17. steven2

    Electronic Stethoscope 2

    audio guru its ok i see someone couldent get the stephoscope 2 working so changes were done or needed to get it going , i need to get the full details here and read the seccessfull tests by those who have biult it and tried it ,
  18. steven2

    New areas and new moderators

    :)good on you guys take us into the 22nd century and we will all make this the best site on earth, dazza take us into warp drive,
  19. steven2

    Playing with hydrogen

    found it , dazza i see youve been doing some moveing, here and i was haveing trouble trying to find this topic, ive been busy on big ear project so ill report soon on hydrogen exsperiments when i get to it.
  20. steven2

    big ear, fm transmitter.

    :)
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