以单片机为核心，设计一个8位竞赛抢答器：同时供8名选手或8个代表队比赛，分别用8个按钮S0～S7表示。-Microcontroller as the core design of an 8 Competition Responder: for 8 players or eight team competition, respectively, using 8 button the S0 ~ S7.