简易抢答器，开始时，接通拨码开关Ｋ１，通过单片机驱动数码管进行倒计10ｓ(数码管显示9—0)，倒计10ｓ完毕后数码管显示横杠（-），此时，可任意接通四个抢答开关（Ｋ２，Ｋ３，Ｋ４，Ｋ５）其中一个来进行抢答，抢答完毕后，数码管显示抢答结果（即抢答开关号码），最后，Ｋ６给一个单脉冲，数码管进入新循环状态：倒计时，接着下一轮抢答。-Easy Responder, start, turn DIP switch K1, microcontroller-driven digital tube carried countdown 10s (digital display 9-0), digital display countdown 10s after the dash (-), then, can be arbitrarily switched one to answer in digital display Responder Responder after results (that answer in the switch number), and finally, K6 to a single pulse, digital tube into new four answer in the switch (K2, K3, K4, K5) circulatory status: countdown, followed by the next round Responder.