555 voice controlled delay lights out switch circuit
Source: InternetPublisher:司马缸砸光 Updated: 2010/06/16
![555声控延时熄灯开关电路](http://www.eeworld.com.cn/circuit/upload/538a1bc8a409ff500dc8e0cb6c6d7ecb/831dfbc0-3c63-11ec-84a8-086126841eb8.gif)
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