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  1. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    i've changed the polarity of the mic. I was surprised to see that the LED lit. bravo! but it was turned on all the time. a closer inspection revealed that a wire is placed from the +V source to pin1 and also the ground was connected to pin8. that was wrong, right? i think so because the LED...
  2. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    the operation of the circuit discussed in the site is very brief. i hope I could get e more thorough explanation about its design. i need to know what's happening in the circuit from the moment someone whistles up to its emission of a beeping tone. i want to know why the parts are wired the way...
  3. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    the operation of the circuit discussed in the site is very brief. i hope I could get e more thorough explanation about its design. i need to know what's happening in the circuit from the moment someone whistles up to its emission of a beeping tone. i want to know why the parts are wired the way...
  4. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    ow.. that would be alright.. you could have a look at it as your time permits.. i'Ve also been a poll watcher once.. yah!  its lots of fun alright.. sitting there for hours doing nothing but tally the votes.. you take care of yourself.. here in the Philippines, things like that could get ugly...
  5. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    thanks.. that clearly shows that the positive terminal of C2 is not directly connected to
  6. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    i did a pcb design on the circuit and i needed a second opinion so i asked a friend to make his own version.. the design is similar except for the c2 and c3.. he placed one terminal of r7, r6, and +c2 with pin4.. whereas in my design, i have r7 between pins 3&4 and r6 between pins 4&5...
  7. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    that's my main objective this coming week! during the defence, the panel asked me how small it would be, i said, i would probably use a 3X4 PCB.. i know ist too big but i dont want them to expect too much.. assuming none is available, any other alternative?! any more suggestions how i...
  8. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    have you build the circuit sir?! what is its max range?! dimensions?! what battery should i use?! am going to construct the circuit after our proposal defence this afternoon.. thnkz!!
  9. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    i still haven't constructed it because i dont have enough money right now.. the construction of the project is on the second sem.. this finlas of the first first sem, we are only required to submit chapters 1-3.. im really broke right now, and i owe everybody..  :( i hope you could help me in...
  10. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    i was busy preparing for my defense this coming wednesday.. we are about to defend chapters 1(the problem) chapter 2 (Review of related literature and studies and chapter 3 (research design and methodology..  one of my most feared, anticipated question is... "are you aware that there is...
  11. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    WOW!  :o that was really "electronically speaking"!!!  ;D all this time, i was keying-in sound activated devices.. switches.. whistle circuits..  :P :P duh?!, right!!?! anyway, thanks for the help, again.. i skipped my first period  ;D gotta go! dont wanna be late for the second one..
  12. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    i'm not abusing help or being lazy.. but i need your help about some info about the history of sound activated circuits.. i've been searching for days, but i cant really find a site discussing such facts.. maybe, i just dont know the right keywords to search in google... i've tried online...
  13. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    the mixing up of the projects only proves that i really need some sleep.. it's really nice of you to modify the circuit.. may you please do it one more time?! i am planning to have a light source to go with the beeping.. so that it can be easier to locate.. and should also include a separate...
  14. logan_dslasher

    i need help extending the keys finder project. can someone help me out????

    http://www.electronics-lab.com/projects/misc/008/index.html <-- key finder or http://www.electronics-lab.com/projects/misc/002/index.html <-- whistle responder which of the two is better?! how do they differ? which of them can easily respond to a novice/trying hard whistler?!
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