"基于单片机的数字抢答器设计与应用研究"

考的外围电路更加简单，简化了外围硬件电路，很多任务都交给了软件编程。SCM不仅应用方便，体积小价格低，而且还很稳定可靠。如果说应用程序赋予了SCM新的"生命"，那么抢答系统的"身躯"则是由SCM系统的硬件结构赋予的，使其具有成本低、电路简单和运行可靠等优点。抢答器是为选手提供便利进行抢答的设备，当选手抢到题目时需要回答问题。抢答器不仅考验选手的知识面和反应速度，还需要勇气和技巧。对选手来说是公平公正的，因为他们都站在同一个起跑线上。 关键字：定时电路、抢答电路、报警电路。Digital response system is composed of expansion circuit and main circuit. The input signal of the participating team displayed on the screen is generated by priority encoding circuit, latch, and decoding circuit. The expansion circuit implements a timing function on the display screen output, generating signals from the timing circuit and decoding circuit. The main circuit consists of a control circuit, host switches, and an alarm circuit. The digital response system is completed through wiring, commissioning, and soldering work. To simplify the peripheral hardware circuits, the SCM delegates many tasks to software programming, making the implementation of peripheral circuits more straightforward. SCM is not only easy to use, compact, and cost-effective, but also reliable and stable. If the application program gives SCM new "life", the hardware structure of the SCM system gives the response system its advantages of low cost, simple circuit, and reliable operation. The response system is a device that facilitates players to participate in response activities. When a player obtains a question, they need to answer it. The response system not only tests the players' knowledge and reaction speed but also requires courage and skill. For the players, it is fair and just because they are all starting from the same starting line. Keywords: timing circuit, response circuit, alarm circuit.