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Piezo buzzers are used for making beeps, tones and alerts.
The buzzer that comes with the MetaWear Kit is small and loud.
You can drive it with 3-30V peak-to-peak square wave.
To use, connect the red wire pin to power on pin 11 (3V) and the other wire (blue or black) to pin 10, the haptic driver pin on the MetaWear. Then connect a 1KOhm resistor in parallel (between pin 10 and 11) For the loudest tones, stay around 4 KHz, but it will work at frequencies between 2KHz and 10KHz. The duty cycle is always 50%.
The buzzer is 13.70mm in diameter and 4.00mm thick.
Sample MetaWear android App link on the Google Play store:
https://play.google.com/store/apps/details?id=com.mbientlab.metawear.app&hl=en
Sample MetaWear ios App link on the Apple App store:
https://itunes.apple.com/US/app/id920878581
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