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Piezoelectric buzzer teardown

Posted on Thursday, June 1st, 2017 in Teardowns by DP

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A teardown of piezoelectric buzzer from  Electronupdate:

An assembly commonly used on fire, burglar and similar alarm systems.
Based around a piezoelectric disk coupled to a plastic cylinder with a hole on the end (used to amplify the sound).
The controller appears to use a rom-based look up table to generate the sounds
The pattern right below the array almost looks like a series of digital wave forms. I think this is strong evidence of an address decoder.. I presume there is a decoder below each of the columns which actives if the pattern matchs.

More details at Electronupdate blog.

Check out the video after the break.

This entry was posted on Thursday, June 1st, 2017 at 3:31 am and is filed under Teardowns. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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