Hi Everyone. I thought I would get some opinions on a project I am
working on. I am working on an ultrasonic varmint repeller to discourage
cats, racoons, oppossums, etc. and am not sure how loud I
can make it before blowing the tweeters. I remember a rather universally
characteristic figure of around 28 VRMS.
I think I could drive one at a few hundred watts if I had a transducer
that could withstand it. however, I don't want to run up my power bill,
and I want to maintain simplicity, so I don't want to bother with a
proximity detector. The present version runs on a standard 120 VAC timer
set to run dusk to dawn.
Therefore, I am considering driving it with only around 40 volts peak to
peak, but tuning the physical sonic area around the piezo element so
that it can resonate somewhere around 17 or 20 Kilohertz.
So the main thing I am wondering about is whether peaking the output for
a certain frequency will physically damage the piezo element inside the
tweeter. If the effect is anything like a cone speaker in a speaker box,
then my impression is there should be no problem. Howerver, the piezo
element is a crystaline structure, and I suspect that it may crack.
Thanks in advance, everyone.
working on. I am working on an ultrasonic varmint repeller to discourage
cats, racoons, oppossums, etc. and am not sure how loud I
can make it before blowing the tweeters. I remember a rather universally
characteristic figure of around 28 VRMS.
I think I could drive one at a few hundred watts if I had a transducer
that could withstand it. however, I don't want to run up my power bill,
and I want to maintain simplicity, so I don't want to bother with a
proximity detector. The present version runs on a standard 120 VAC timer
set to run dusk to dawn.
Therefore, I am considering driving it with only around 40 volts peak to
peak, but tuning the physical sonic area around the piezo element so
that it can resonate somewhere around 17 or 20 Kilohertz.
So the main thing I am wondering about is whether peaking the output for
a certain frequency will physically damage the piezo element inside the
tweeter. If the effect is anything like a cone speaker in a speaker box,
then my impression is there should be no problem. Howerver, the piezo
element is a crystaline structure, and I suspect that it may crack.
Thanks in advance, everyone.