8051，5路抢答器，抢答成功后，数码管显示相应的代号，并有声音提醒，每次抢答后要等约两秒钟的时间才能进行下一轮抢答-8051,5 way Responder, Responder after the success of digital tube display the corresponding code, and a voice reminder, we have to wait after each answer in about two seconds of time to answer in the next one