摘要：目前在应用中大多采用的抢答器都是有线形式的，这样在实际实用中就比较的烦琐，也造成了一些不必要的元器件浪费等。为此特设计了无线遥控多路抢答器。这是对抢答器的进一步改进，本设计有效的解决了一些抢答器的不足之处。此电路由SC2262/SC2272编/译码芯片组成发射和接收电路，利用编码芯片SC2262构成发射电路，来发射信号。再由译码芯片SC2272解码读出信号，送单片机，由单片机STC89C51控制数码管显示相应按键的编号，同时蜂鸣器鸣叫。达到实现无线遥控抢答器的目的。两个SC2262芯片最多可提供八路输入信号,所以设计的是八路无线遥控抢答器。此电路操作简单等。本设计利用 keil 软件进行编程，然后进行编译，利用 Proteus 软件进行仿真，进行调试和运行。最终基本用仿真实现了所有功能。然后进行实物的焊接和调试，基本实现了预期的功能。92775

毕业论文关键词：无线收发模块、STC89C51单片机、蜂鸣器、LED数码管

Abstract: in the application of most of the responder is wired form, so in the practical application of the more cumbersome, but also caused a number of unnecessary components such as fee。 To this end, the design of wireless remote control multi-channel responder。 This is the answer to the further improvement of the device, the design of an effective solution to some of the shortcomings of the responder。 The circuit is composed of SC2262/SC2272 encoding / decoding chip to transmit and receive circuit, using the coding chip PT2262 constitute the transmitter circuit, to transmit signals。 Decoded by the decoder chip SC2272 read the signal sent to the microcontroller, the microcontroller STC89C51 control digital display of the corresponding key number, while the buzzer。 To achieve the purpose of wireless remote responder。 Two SC2262 chips can provide up to eight input signals, so the design is the eight wireless remote control responder。 This circuit is easy to operate, etc。。 This design uses the keil software to carry on the programming, then carries on the compilation, uses the Proteus software to carry on the simulation, carries on the debugging and the movement。 Finally, all the functions are realized by simulation。 And then the welding and debugging, the basic realization of the expected function。源F于K优B尔C论V文N网WwW.youeRw.com 原文+QQ752^018766

Keywords: wireless transceiver module, STC89C51 microcontroller, buzzer, LED digital 

目   录

1引言 4

1。1课题背景 4

1。2课题内容及意义 5

1。2。1课题内容 5

1。2。2课题意义 5

2系统设计 6

2。1 系统的要求设计 6

2。2系统总框图设计 6

2。3 STC单片机来自优O尔P论R文T网WWw.YoueRw.com 加QQ7520`18766 原理 7

2。3。1单片机最小系统 9

2。3。2时钟电路 10

2。3。3复位电路 10

2。3。4中断技术概述 11

3系统硬件电路设计 12

3。1抢答器电路 13

3。1。1主持人电路 13

3。1。2 选手抢答键 14

3。1。3 显示与显示驱动电路 15