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weird Component

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?

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  • \$\begingroup\$ It's a piezo disc, used to make basic beeping sounds, like the beep from the microwave when its finished. I'm not sure what its doing in your TV. \$\endgroup\$
    – Steve G
    Aug 20 '16 at 16:58
  • \$\begingroup\$ @SteveG SAME ON THE TV PART!!!!!!!!!!! \$\endgroup\$ Aug 20 '16 at 16:59
  • \$\begingroup\$ @SteveG Its an old TV so I don't know. \$\endgroup\$ Aug 20 '16 at 16:59
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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.

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  • \$\begingroup\$ One can use this as a noise maker or noise sensor near its resonant frequency. example communica.co.za/catalog/Details/P1362893234 \$\endgroup\$ Aug 20 '16 at 17:06
  • \$\begingroup\$ @darkness - Alternatively, it can also be used to convert stress into a voltage. \$\endgroup\$ Aug 20 '16 at 17:32
  • \$\begingroup\$ @Whiskeyjack Yes I was going to put that but thought current was better for the OP's level. \$\endgroup\$ Aug 20 '16 at 17:34

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