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介绍了用串联逐级给５５５集成电路供电组成多级顺序控制器的原理和方法，分析了组态电路的实现方法及设计参数．实验表明，该控制器具有抗干扰力强、电路简单、工作可靠等优点．
The principle and method of multilevel sequence controller composed of 555 integrated circuits in series are introduced. The realization method and design parameters of the configuration circuit are analyzed. Experiments show that the controller has the advantages of strong anti-interference ability, simple circuit and reliable operation.