CAJ | 학술논문

抢答器是学校常用的智力竞赛优先判决电路。采用STC89C52单片机为核心设计出具有限时抢答、限时答题、报警显示等功能的八路抢答器。硬件电路中采用继电器把按键信号和单片机信号隔离，提高电路抗干扰能力。结合数据锁存及数码驱动芯片，提高电路带负载能力。利用电路板设计软件Protel，结合元器件实际尺寸设计出易于制作的单面印制板图。最后经过实际制作、使用验证，印制板设计合理、元件插装方便、操作简单、价格低廉，且能及时准确地判断抢答者，效果良好。
창답기시학교상용적지력경새우선판결전로。채용STC89C52단편궤위핵심설계출구유한시창답、한시답제、보경현시등공능적팔로창답기。경건전로중채용계전기파안건신호화단편궤신호격리，제고전로항간우능력。결합수거쇄존급수마구동심편，제고전로대부재능력。이용전로판설계연건Protel，결합원기건실제척촌설계출역우제작적단면인제판도。최후경과실제제작、사용험증，인제판설계합리、원건삽장방편、조작간단、개격저렴，차능급시준학지판단창답자，효과량호。
Responder is a priority decision circuit commonly used in quiz game of schools. An eight-way responder with time limit answer,answer in time and alarm display functions was designed on the basis of STC89C52 microcontroller. A relay is adopted in the hardware circuit to isolate the key signal and SCM signal,and improve noise immunity of the circuit. The data latches and digital driver chip are combined to improve load capacity of the circuit. According to the actual size of components, the single-sided PCB was designed with software PROTEL. The actual production and verification result show the PCB’s design is reasonable,the element insert is convenient,its operation is simple,its cost is low,and the responder can timely and accu-rately determine who is the first vier.