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I was wondering what is the name of this component, it really doesn't really have a part number, or anything similar so my research has really gone down to a low. Researching silver disk thingy does not help either.
I found this part in a microwave, as well as in an old CRT TV, along with a bunch of other good parts. What is the name, and purpose of this component?
Just as SteveG said
It's a piezo disc, used to make basic beeping sounds, like the beep from the microwave when its finished.
You can learn more about it here. It involves the piezoelectric effect which is more physics, but basically when a stress is applied to piezoelectric material a current is created.
