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Four Interlock Switch Controller(CD4028) Circuit

2017-01-06 21:19  
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Four Interlock Switch Controller(CD4028) Circuit
The four interlock switch controller circuit shown in the picture uses one decimal docoder integrated circuit CD4028 with four BCD code input terminals which have 10 decoding output terminals. The circuit uses its four special input codes to compose a four interlock switch controller. Its circuit is shown in the picture. The circuit consists of CD4028 and four button input switches SB1-SB4 and four output indicator circuit.Four output terminals will be connected to control circuit. CD4028 is 16-pin flat plastic structure, and its four input terminals are A,B,C,D. Its ten output terminals are Q0-Q9.