Environment tester design. The measurement system of the environment can give fu...

在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct

单片机DA转换源码，在串口调试助手下可以查看发送到串口的转换结果，波特率设置为2400 -Singlechip DA conversion source, in the serial debugging assistant can view the sent to serial conversion results, the baud rate is set to 2400

基于80c51的半双工红外发射程序，带键盘可修改发射内容

万年历的完整算法:1900~2100 它首先计算出对应阳历月第一天对应是星期几，然后根据数据压缩算法确定， 确定对应的阴历日期； 而阴历节气，则有条件规律算法实现 这个万年历包括 阳历 阴历 星期对照 阴历 天干地支 生肖 -calendar integrity algorithm : 1900-2100 its first calculation of the corresponding solar calendar counterpart on the first day of the week. according to data compression algorithm to determine the date corresponding to the lunar calendar; and the cycle of the lunar calendar, it conditional law algorithm to achieve this calendar week including solar control the lunar calendar the Year of the lunar calendar Thus

AT89S52单片机中数码管的循环显示的实现例子，可以让大家清楚看到这么用数码管来显示数字-AT89S52 MCU cycle of digital tube display examples realize that allows everyone to see so clearly with digital control to display the number of

LCD1602 移出显示字符串-Out of the LCD1602 display string

此程序是利用51单片机，控制蜂鸣器接口高低电平，让其发出歌声。-This procedure is the use of 51 single-chip microcomputer to control the buzzer interface high-low, so the issue of voice.

异步电机无速度传感器直接功率控制系统,很好的资料-Induction motor speed sensorless direct power control systems, good information

2007年大学生电子竞赛小车控制代码，编译环境为Keil C51，单片机位AT89S52-2007 race car undergraduate electronic control code

MSP430单片机上的CH452键盘扫描程序-MSP430 the CH452 keyboard Scan