That brass disk is a piezo speaker, they use it as a basic microphone to "hear" your drum tap. All scrap is worth something! better two boards, than nothing! Thanks for the info!!!
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That brass disk is a piezo speaker, they use it as a basic microphone to "hear" your drum tap. All scrap is worth something! better two boards, than nothing! Thanks for the info!!!
“Most people miss opportunity because it wears overalls and looks like work .” ― Thomas A. Edison
www.thortekrecycling.com
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