The resonance of ferrite winds up being very useful in ultrasonic cleaners in that it allows a higher level of energy transfer than would be available at a nonresonant frequency. Some disk capacitors exhibit a similar ringing due to a piezoelectric effect.
Frequencies are often times found in circuits where most would not expect it.
I deal with RF Amplifiers, and we have one circuit that uses a simple ferrite that is rectangular with a 75-ohm strip of wire through the center of it. As we increase the power out of the amplifier, the ferrites literally sing. Albiet this is slightly a different cause than the article, it is an interesting phenomenon that can be found in many places.
By the way, what was ever done to completely remove the ringing, or was the epoxy solution the final one?
A middle school team from Rochester, Mich., has again nabbed the grand prize in the annual international Future City Competition, which drew students from 37 regions of the United States, as well as from England and China.
The word “smart” is becoming the dumbest word around. It has been applied to almost every device and system in our homes. In addition to smartphones and smart meters, we now hear about smart clothing and smart shoes, smart lights, smart homes, smart buildings, and every trendy city today has its smart city project. Just because it has a computer inside and is connected to the Web, does not mean it is smart.
Are you being paid enough? Do you want a better job? According to a recent survey Manpower released just before Engineers Week, employers and engineers don't see eye-to-eye about the state of US engineers' skills and experience.
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