ultra high frequency agitator

[deepak007]

frequency agitator

hello

i have a circuit idea.is it possible to make a ultra high frequency oscillator and feed it to a piezo element or some transducer. and when the piezo or transducer is brought close to a glass it has to break. just like in the movie "die another day". is it possible? please give some suggestions.

thanks in advance

 

[kender]

frequncy aggitator

How many Watts of acoustic energy will it take to break a glass?

 

[Eugen_E]

high frequency agitator

The frequency of the signal should be varied to reach the resonance frequency of the glass.
I don't know how to get optimum coupling to the glass and the value of the resonant frequency. The piezo element has high efficiency only in a frequency bandwidth.

You can make a voltage controlled oscillator using the 4046 VCO and couple it to an audio power amplifier either IC or with discrete power MOSFET. The amplifier quality, low distorsion is not so important. I know someone who made an ultrasonic cleaner this way.
The power may be < 20W, but if the frequency is in audio range it will be annoying and may affect hearing with a high performance piezo.

 

[deepak007]

ultra high frequency breaks glass

hello Eugen_E

what is an ultrasonic cleaner?

 

[echo47]

Here's a demonstration video, however the resonant frequency of this glass is a lot lower than ultrasonic:
"Breaking a wine glass using sound"
https://www.youtube.com/watch?v=ECNDpCYvaOc

 

[Eugen_E]

Ultrasonic cleaner: http://en.wikipedia.org/wiki/Ultrasonic_cleaning .

The guy who built the cleaner was into crafts, model airplanes and used it to clean tiny mechanic parts, etc.
An alternative to 4046 is a Wien bridge oscillator with resistors - a stereo potentiometer.

From the video posted by echo47 it seems that the power is not too high to affect hearing, it may be possible to make such device. The secret may be how to concentrate the acoustic energy on the glass.

PS. This is really crazy: http://dansdata.blogsome.com/2006/10/13/ultrasonic-baby-cleaning/