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Network voltage fault protection indication circuit

2016-09-21 11:36  
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Network voltage fault protection indication circuit
The circuit is as shown, the ouput termlnal of digital-analog converter DAC-08 connects to DC input voltage, then itwill form a typical digital-analog converter, the input is AC voltage, it can detect and find the network voltage sloughy or descendent, then it will use a output number to show it.