SparkFun Part Number: SEN-10293

Description: 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 also be used for a very small audio transducer such as a buzzer. Diameter is 20 mm.

Documents:

• Datasheet (7BB-20-6L0)
• Arduino Tutorial

* Original SparkFun product description and images used with Sparkfun permission.