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  1. steven2

    geophone kit circuit reqest

    thankyou audio guru it dose look like a speaker hey, i have a better picutre of the geophone but its in my kodack pictures but when i go to look at it its there but when i go to choose the file with it to post it  i go to look at it first to see if ive got the right one and its not there so i...
  2. steven2

    geophone kit circuit reqest

    i couldent find the right picture but this will do
  3. steven2

    geophone kit circuit reqest

    :)here is a picture of what the actual geophone looks like inside so ill have to do some constrution here to get the coil as bouncy as possible to be sensitive
  4. steven2

    geophone kit circuit reqest

    :)the 741 inverting or non inverting amp circuit i got that off the net i just added the coil to it and led and current limiting resister, and as for the first circuit well its the circuit that allows ac to controll dc i just modified it so the  dc led comes on from the induced ac into the coil...
  5. steven2

    geophone kit circuit reqest

    :)ill work on it more then but the latest picture here works perfect to and the led responds incredibly easy to the most tinyest movements of the magnets  as for the 104 monoblock in the other with the lm386 op amp well i used the same circuit  as did with the super snooper type circuit i think...
  6. steven2

    geophone kit circuit reqest

    :)
  7. steven2

    geophone kit circuit reqest

    :)this next circuit is just the 741 inverting op amp or non inverting op amp circuit with a few samll changes made to it as for the small led , well i had a 1k current limiting resister for it but changed it to 390 ohms then i ended up settleing for the 2.2k as each test with each resister...
  8. steven2

    geophone kit circuit reqest

    here is the latest  pictures and circuits , the first one is the 7141 inverting or non inverting op amp circuit i added to the lm386 audio amp and with the microwave oven coil in place this one makes audio nioses to the movement of the powerfull rare eath magnets held above it  but this one...
  9. steven2

    geophone kit circuit reqest

    :)thankyou audio guru ive did some more exsperiments and used an lm386 audio amp circuit now ive got audio but ive allso  made a really sensitive one which works great ill add your changes  to it and post the others soon
  10. steven2

    geophone kit circuit reqest

    :)
  11. steven2

    geophone kit circuit reqest

    :)i welcome any modifications and changes  to this circuit, oh the 2 transisters are bc547b types  that transister is an improvement over the bc547 a types transister
  12. steven2

    geophone kit circuit reqest

    audio guru its just got one small led  and youll have to see the circuit to as you may want to make some corections  ill put it up soon, by the way i receaved email notification of reply to this topic but when i double clicked on it to get here i got a different page wanting details and password...
  13. steven2

    geophone kit circuit reqest

    :)heres the latest ive been exsperimenting with an idea , first the inner section of the geophone , is a cylindrical cylender with a fine coil around it this cylender is suported by  sensitive springs , 2 at the top and 2 at the bottom  and through the cylender is a magnet now i beleave the soft...
  14. steven2

    CA3094 IC DATA REQEST

    thankyou hotwater wizard
  15. steven2

    CA3094 IC DATA REQEST

    thankyou audio guru the electronic deer repelant circuit is what its used in but i geuss that part would be hard to get here at the local electronics store , its not even in my catalouge , oneday they might draw circuits that use parts that are not to old and easy to get
  16. steven2

    CA3094 IC DATA REQEST

    :)has anyone got the data on this ic and allso any replacements if any  the info for this ic aint so freely availiable on the net without haveing to log in to get it , this  is an ic not a classified peace of plastic where ya have to log in and go through the paper work just to veiw its details...
  17. steven2

    geophone kit circuit reqest

    :)http://www.bgmicro.com/prodinfo.asp?sid=04652314814814816624966143&prodid=KIT1019&page=1&cri=KIT&stype=2
  18. steven2

    geophone kit circuit reqest

    here is a picture of the geophone circuit kit the metal thing on the left is the actual geophone
  19. steven2

    geophone kit circuit reqest

    ive found a simple looking geophone kit thats sold on the net but , i cant find any free circuits for it , they said they mounted it on a board and berried it under some dirt and it has leds on it and the closer it senses the footseps of people and even cats the more leds will light up, this...
  20. steven2

    Ante 50 Years Young

    happy birthady ante from australia
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