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 can easily 'grow' your own piezoelectric crystals overnight using just a couple of common ingredients - awesome.
Find more at the Maker Shed: [ Ссылка ]
Make: Electronics, 3rd Edition: [ Ссылка ]
Learn more here:
[ Ссылка ]
![](https://i.ytimg.com/vi/K3G2QM5a-9U/mqdefault.jpg)