急!急!急!毕业设计论文,请各位才子办法救急!!!

来源:百度知道 编辑:UC知道 时间:2024/06/15 02:55:29
课题1:无线电遥控器
设计要求:
(1)遥控电路的发射频率为28MHz.(业余频段)
(2)发射距离为30m左右,主要是在家庭内遥控家用电器开关。
(3)发射器电源电压要求在9V以下。
(4)遥控接收器要求能够较准确地接收28MHz 的载频信号,并解调出控制信号控制开关动作。
(5)遥控接收器的电源要求利用220V交流电源供电,设计出一个简易稳压源为其供电。
(6)整个遥控电路尽量简单可行。
课题2:简易数字电压表的设计
一、要求:简易数字电压表可以测量0~5V的8路输入电压值,并在四位LED数码管上轮流显示或单路选择显示。测量最小分辨率为0.019V,测最误差约为 0.02V
二、内容:
(1)方案总体设计
(2)控制系统硬件电路设计(显示采用四位数码管)
(3)软件流程图设计,汇编程序编写
(4)电气原理图的绘制
以上两个题目只要做一个就可以,请各位才子帮忙发我QQ邮箱里,我QQ是277592565,我本想把悬赏分提到200分,可是最高选项才100分,没办法了,我可以追分,请各位才子帮忙了,谢谢

第一个是老式的无线电遥控,超再生电路就是由此30MHz短波发端的,电路简单,就用现在的遥控芯片,改个射频就可以了。

第二个,要单片机编程,在这里写出太麻烦了吧。

Topic: wireless remote control
Design requirements:
(1) the frequency of the emission control circuit 28MHz spare frequency).
(2) launch distance for about 30, mainly in the remote control household appliances within the family.
(3) transmitters in the power supply voltage required 9V below.
(4) remote receiver is required to accurately determine the 28MHz receives signals, and the control signal demodulation control switch.
(5) the power required to exploit the receiver remote communication power supply, the design of 220V voltage source for a simple its power.
(6) as the remote circuit is simple and feasible.
Topic 2: design of simple digital voltmeter
A simple digital voltmeter and requirement: can measure the 8 0 ~ 5V input voltage values, and in four LED digital display or turn on the pipe road choose to display. Minimum 0.019 resolution