of the microcomputer system to give the answer systems, "body", and SCM application gives the new "life", so that it has characteristics of simple circuit, low cost, reliable operation and in front of the tradition vies to answer first. For the responder we all know it is for the player to do the rush to answer for. Players vies to answer first, grab the player to answer the question. Responder not only tests the player's reaction speed but also requires a player with enough knowledge and courage. Players are standing on the same starting line, reflects the principle of fair and equitable.

Key words: answer circuit timing circuit warning circuit

一、实验目的

1、对单片机进一步掌握 2、实现自己设计实验完成实验 3、掌握仪器设计原理

二、实验内容

（1）系统容量：为满足竞赛抢答的要求，系统容量定位8路。

（2）系统能完成：倒计时指令发送与接收；抢答对别信息发送与接收； （3）抢答倒计时可在0-99秒内根据需要任意调整。 （4）所有信息交换都采用无线通信。 （5）抢答指令发出和抢答成功要有提示音。

三、实验设备

51单片机箱