555 zero cross circuit
Source: InternetPublisher:风向西瓜 Updated: 2018/03/24
![](http://www.eeworld.com.cn/circuit/upload/538a1bc8a409ff500dc8e0cb6c6d7ecb/90b44550-3c63-11ec-88b8-086126841eb8.gif)
![](http://www.eeworld.com.cn/circuit/upload/538a1bc8a409ff500dc8e0cb6c6d7ecb/90b4ba80-3c63-11ec-8cab-086126841eb8.gif)
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