Hi there again!
Sorry for these last period inactivity!
I had some problems at the collage (and
and still have)... but nevermind...
These days me and my gf plan a trip in the mountain wilderness here in the Carpathian mountains. (btw, The heaven on earth!
) and we saw that our road meets some high altitude sheepfolds. Nothing scary about these kind of places, except for those big (and I mean really BIG) dogs they have there. In our native language they are called "ciobanesti" (the shepherd's dogs); they protect the sheepfold for wolfs and even brown-bears, so imagine what I'm talking about...
We had some problems (without injuries) before, and now we plan to take measures.
This why I will try building a "pocket ultrasound dog repeller" and I'm some kind of novice in the speakers zone... and have questions and if you could give me some directions about that I would appreciate that.
I've found also a schematic that I linked here.http://www.discovercircuits.com/PDF-FILES/40KULTRASOUNDRVR2.pdf
If someone know/understand how these schematic works, please reply these thread.
So... my first question would be:
Should I use a piezo buzzer instead of a tweeter for that ultrasound?
Thank you and probably, with your online help I will do a tutorial about this in progress, for those out there and especialy those of us in here who dream about a world of robots (guverned by men, of course