555 infrared monitoring wireless alarm circuit
Source: InternetPublisher:桂花蒸 Updated: 2012/07/17
![555红外监控无线报警器电路](http://www.eeworld.com.cn/circuit/upload/538a1bc8a409ff500dc8e0cb6c6d7ecb/8c36c2ac-3c63-11ec-842f-086126841eb8.gif)
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