Recent content by olive

  1. O

    Modification of anti-bark control circuit - help please!

    nice simple solutions... thanks. will give the scope a try some eve this week and report back
  2. O

    Modification of anti-bark control circuit - help please!

    tracing with oscilloscope question i found an oscilloscope at work that i can use, but i'm guessing that i need the circuit to be producing the ultrasonic and audio signals to be able to trace/detect them with the oscilloscope. other than yelling into the mike, should i be able to trick the...
  3. O

    Modification of anti-bark control circuit - help please!

    i've got sharp probes...thanks for the tip.
  4. O

    Modification of anti-bark control circuit - help please!

    crystal and trace Thanks much for the pin info and suggestions. I need to either make or source an ear crystal, which shouldn't take too much effort, and I'll do some tracing with it and chime back in with what i find. Thanks again !
  5. O

    Modification of anti-bark control circuit - help please!

    Reply to Chris - Tracing the audible and ultrasonic signals Chris - Can you suggest what tools I would need and how to go about tracing that signal? I can let everyone know what I find... Thanks for the suggestion. It's what I was hoping is possible.
  6. O

    Modification of anti-bark control circuit - help please!

    more of the same...or other options... Hopefully these images tell the full story of the circuit board. Please let me know if they don't, and i can certainly diffuse the light and take new images. - - - If filtering the audible signal is not an option, is there a way to use the circuit...
  7. O

    Modification of anti-bark control circuit - help please!

    same photos - possibly full sized you might be able to see full sized images here: https://plus.google.com/photos/117403568795188843985/albums/5889355568284947489?authkey=CKnPtsLKk5-ZwwE
  8. O

    Modification of anti-bark control circuit - help please!

    detailed pics. let me know if these aren't high detail enough. they're compressed files. i can post the full sized images online, but maybe Electronics Point won't allow the full sized images on their site
  9. O

    Modification of anti-bark control circuit - help please!

    tracing follow up sounds good. i'll take better pics and post later today. thanks for trying this out with me! also, i think the audible signal, while high frequency within the human range, is not anywhere near 'our' limit of 20,000 Hz, which is really a child's limit, and the starting...
  10. O

    Modification of anti-bark control circuit - help please!

    tracing and what's coming from the speaker... If you've got any thoughts or advice for how to trace the signal, please let me know. I may have the tools, but I don't know what I should be looking for. If I were just to guess, I'd say the easiest thing to do would be to use an oscilloscope...
  11. O

    Modification of anti-bark control circuit - help please!

    i have access to a volt-meter, and if i tried hard, i could probably get access to an oscilloscope. i wonder if i might be able to (with either of those tools) trace to the source of the audible signal and disconnect it? filtering seems like it should be a possibility. in optics, i know i can...
  12. O

    Modification of anti-bark control circuit - help please!

    labeling - U1 and U2 U2 is the 8 pin chip U1 is the 14 pin chip
  13. O

    Modification of anti-bark control circuit - help please!

    Chip info - much more clear after wiping away the flux? let me know if the pics aren't clear...i'll type out the info
  14. O

    Modification of anti-bark control circuit - help please!

    chip info on the way... the chip surfaces are rough, but i'll see what i can do to extract the names/details
  15. O

    Modification of anti-bark control circuit - help please!

    I have a circuit with a microphone and speaker that detects sustained loud noises (dog barking) and emits an ultrasonic (audible to dogs) and a sub-ultrasonic (audible to human) signal to deter the dog from barking. It's used as a training tool. PHOTOS ATTACHED!! I find the audible to human...
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