单片机 抢答器 任意一个开关按下时，按时间优先、位置优先判决谁最先。某选手按下开关时，对应喇叭响5秒，对应LED灯闪烁5秒。1个数码管显示相应选手号-The microcontroller Responder any switch is pressed, according to time priority, location, priority judgment Who is the first. A player when the switch is pressed, the corresponding horn ring for five seconds, the corresponding LED lights flash for 5 seconds. A digital display corresponding players