| Line 50: | Line 50: | ||
File:1918.png|model | File:1918.png|model | ||
</gallery> | </gallery> | ||
The basic principle is to have different compartments in a rotating wheel come in contact with a piezo element and mini vibrating motor. | |||
| Line 50: | Line 50: | ||
File:1918.png|model | File:1918.png|model | ||
</gallery> | </gallery> | ||
The basic principle is to have different compartments in a rotating wheel come in contact with a piezo element and mini vibrating motor. | |||