数字竞赛抢答器的设计与实现

Design and implementation of digital competition responder

基于数字时序控制电路原理,采用元器件设计实现了一种显示倒计时的数字竞赛抢答器。该抢答器由组合逻辑电路中的编码器、锁存器、译码器,时序逻辑电路中的计数器和555定时器组合而成。该抢答器具有手动复位功能,倒计时功能和显示功能。经测试表明,该抢答器可以准确显示倒计时时间和抢答号码,反应灵敏,工作性能稳定可靠。

Design and Implement a digital contest responder using component,based on the digital timing-sequential control circuit principle.The responder is composed of encoder,latch,decoder in combinational logic circuit,counter and 555 timer in time-sequential logic circuit.The component has manual reset function,countdown and display features.Tests showed that the responder can accurately displays the countdown time and responder number,responsive,stable and reliable performance.