说明：  设计一个可容纳四组参赛的数字式抢答器，每组设一个按钮供抢答使用。抢答器具有第一信号鉴别和锁存功能，使除第一抢答者外的按钮不起作用；设置一个主持人“复位”按钮，主持人复位后，开始抢答，第一信号鉴别锁存电路得到信号后，用指示灯显示抢答组别，扬声器发出2—3s的音响。 设置犯规电路，对提前抢答和超时答题(例如3min)的组别鸣笛示警，并由组别显示电路显示出犯规组别。 设置一个计分电路，每组开始预置10分，由主持人记分，答对一次加1分，答错一次减1分。
(The design can accommodate four groups participating digital Responder, each set up a button for the answer in use. Responder has a first signal to identify and latch function, the button does not work in addition to the First Responder those outside set host " reset" button, after a reset of the host, began to answer in the first signal to identify the latch circuit Responder groups signal indicator, audio speaker 2-3s. Set the foul circuit, advance Responder and overtime answer (3min) groups whistle warning by the group show circuit shows foul groups. Set a scoring circuit, each group began preset to 10 points by the moderator scoring, answer time plus 1 minus 1, got it wrong once.)