Fellow Canadian Laurence White from Electro-MCU-Stuff has built a neat looking project which uses a piezoelectric element from a tweeter to detect vibrations . He is using a Zilog eZ8 series microcontroller which breaks the Atmel, Microchip or TI norm for the projects we have seen around. I remember Zilog seemed to be very popular years ago but in recent years I haven’t heard much from them.

Follow this link:
Vibration Sensing using a Tweeter

