Comparison and realization of digital circuit and PLC designed four-way responder

According to the requirement of four-way responder, two different methods of digital circuit and PLC are designed and compared in this paper. The first method is to use the integrated chip "4511" and "555" and the corresponding peripheral circuit to achieve, according to the four-way scrambler design block diagram, successfully designed the schematic diagram and the corresponding PCB diagram, and actually made the finished product; The other method is to use programmable logic controller PLC to realize, designed the ladder diagram and the corresponding statement table of the four-way responder PLC control, and actually made the finished product. Both of these methods have been successfully implemented, have good application value in practice, and can be based on this idea, expand into more and better multi-route responder.