中文人妻熟妇乱又伦精品 _大荫蒂女人毛多高潮_玩弄少妇高潮A片XXX_色综合网天天综合色中文_人妻熟女av_97夜夜澡人人爽人人喊中国片_野花视频在线观看免费最新动漫_亚洲色婷婷婷婷五月_狠狠色狠狠色综合日日五_少妇SPA推油被扣高潮在线观看

A piezoelectric buzzer is an electro-acoustic conversion device that generates a sound due to a mechanical deformation caused by an inverse piezoelectric effect. This product is widely used in the alarm and vocalization of various electrical products. It is generally used in music greeting cards, electronic watches, and pocket calculators. In order to ensure the quality of their use, we should strictly check and choose the most suitable products when purchasing. Here we recommend the method of selecting a piezoelectric buzzer for everyone.

Method one: Select according to voltage size.

The buzzer is generally driven by a square wave (V P-P), and the higher the voltage, the higher the volume.

Method two: Select according to size.

Choosing the buzzer according to its size is also a common method, which is mainly based on the principle that the size affects the frequency. Generally small size frequencies will be higher.

Method 3: Select according to the pin spacing.

Pin pitch can also be Pin pitch. The reason for choosing this factor is mainly due to the large number of specifications of the piezoelectric buzzer, and it is often difficult to find exactly the same specifications. In this case, we can first pick the pitch as close to the trial as possible.