带数码显示的十六路抢答器

摘要

早期的抢答器主要通过模拟电路、数字电路或者两者相结的方式来制作，其成本较高、布局繁琐，功能单一。本文采用AT89C51单片机作为主控芯片设计一个带数码显示的16路抢答器，电路主要包括主体部分和扩展部分。主体部分由优先编码电路，锁存器和译码电路三部分组成，扩展部分由定时电路和译码电路两部分组成。该抢答器集计数，报警，抢答等功能于一身，并且成本也较低，结构简单，适用于很多中小型场所。%In early time, the responder mainly knots through the analog circuit, digital circuit and analog circuit and digital circuit method to make the responder. This approach has a high cost, and the layout is more complicated. This time it adopts AT89C51 to design a digital vies to answer first with a 16 path display. It has counting function, shows contestant number and adjusts the answering time function.