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 […]
Tag Archives: piezoelectric
DIY piezoelectric materials
Make has a video on DIY piezoelectric materials: Piezoelectric materials are about as close to magic as you can get. They turn physical pressure into electricity and can even turn electricity into physical pressure – an amazing sort of bidirectional converter for mechanical and electrical energies. Perhaps even more amazing is the fact that you […]