Piezo Element

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Piezo elements come in handy when you need to detect vibration or a knock. You can use these for tap or knock sensors pretty easily by reading the voltage on the output. They can a lso be used for a very small audio transducer such as a buzzer. **Documents:** * [Datasheet](http://www.sparkfun.com/datasheets/Sensors/Flex/p37e.pdf) (7BB-20-6L0) * [Arduino Tutorial](http://www.arduino.cc/en/Tutorial/Knock) **Videos** Show more