该设计 这样一种基于单片机控制系统的抢答器，其主要是由三个部分构成：一个是由几个D触发器的构成的用于抢答的部分，一个是由几个JK触发器和74LS4511构成用于倒计时，另外一部分则是由两个74190构成的一个可逆计数器，即计分器，外加各部分子电路及其驱动程序，能很好的完成此项设计-The design is designed in such a microcontroller-based control system Responder, which is mainly composed of three parts: one is constituted by several D flip-flop for the answer in part, one is composed of several JK flip-flop and 74LS4511 constituted for the countdown, the other part is composed of two 74,190 consisting of a reversible counter, ie scoring device, plus ministries molecular circuits and their driver, can be very good to complete this design