LCD driver source, the microcontroller is AT89C52.

利用51单片机演奏音乐。定时器控制歌曲的频率（音调），延时时间控制节拍，可以轻松更改为自己想要的歌曲-The use of 51 single-chip music. Timer control of song frequency (pitch), delay time to control the beat, you can easily change the songs you want

基于PIC单片机877的电动自行车控制器的开发原理及源程序。-PIC-based single-chip controller 877 of the electric bicycle and the development of the principle source.

飞思卡尔的电子钟和电子琴的课程设计,包括源代码-Freescale electronic bell and the organ of the curriculum design, including source code

16*16点阵汉字显示，非常简单，应该是简明-16* 16 dot matrix Chinese character display

阀位控制器源程序 利用PIC16F873A-valve controller source use PIC16F873A

主要是对显示屏进行连接操作,屏幕大小为128:64,可以发送图片汉字到显示屏-Primarily to connect the operation display screen size of 128:64, you can send pictures of Chinese characters to display

用AD603提高超声波测距范围。超声波测距是一种非接触的测量方式，它是根据超声波从发射传感器到反射物体，再从反射物体到接收传感器的延迟时间.，利用距离/01. 2 ’，得到距离值，1 为声波在空气介质中的传播速度。由于反射超声波接收时的信号幅度与反射物体离接收传感器的距离远近有关，一般相差几十分贝-Ultrasonic Distance Measurement with the scope of AD603 improve. Ultrasonic Distance Measurement is a non-contact measurement, which is the ultrasonic sensor to the reflection from the launch of objects, objects from the reflector to the receiving sensor delay time., The use of distance/01.2, the distance values, one for the sound waves in air medium velocity. Receive as a result of reflection at the time of ultrasonic signal amplitude and the reflection from the object to receive the sensor distance, generally a difference of tens of decibels

利用HD66421实现灰度字符显示，keilC51编译环境-HD66421 realize the use of gray-scale character show, keilC51 compiler environment

电子密码锁资料，包括设计方案，程序等相关资料。-Electronic locks, including the design of programs, procedures and other relevant information.

此程序为自行车计附带产品．可以计里程，计速度．清零等功能．采用霍尔传感器传输信号，单片机采用中断扫描．然后用数组的形式在LED上显示．-procedure for bicycles or spin-off products. Total mileage can be up speed. Reset function. Hall sensor used for signal transmission interrupt SCM scan. Then in the form of an array of LED show.