DDS chip AD9851 applications, using keyboard input at any frequency, liquid crys...

pid控制的源程序，很不错的，请大家注意关注啊-pid control source, it is good, draw attention to concerns ah

采用4046实现的10m以下信号的锁相环 电路图。-used to achieve the 4046 10m below the signal phase-locked loop circuit.

The traffic light is timed and lets cars pass during a specific time period. There is a pedestrial crossing button that lets pedestrians cross. The lights are connected to Port 1. You can see this in action using dScope.

新华龙020 的内置spi0。驱动16位精度dac8831的程序，采用单端方式输出正弦波-Hualong 020 new built-spi0. Dac8831 drive 16-bit accuracy of the procedures, the use of single-ended sine wave output

一个北京青云科技液晶显示器资料，送给学习液晶的同志们。-Beijing Qingyun a liquid crystal display science and technology information to the study of liquid crystal comrades.

HD44780液晶驱动，KEIL C51-HD44780 LCD driver, KEIL C51

PWM Keil C51 零耗时低频宽脉冲软PWM信号控制Keil C51演示程序-PWM Keil C51 zero time-consuming and low-bandwidth pulse soft PWM signal control Keil C51 demo program

空调控制器中按键功能实现的子程序,包括模式设定,温度湿度设定等.-air conditioning controller button functions of the subroutine, including setting mode, temperature humidity limit.

与epson m-150打印机通信，但是有些错误，希望高手指正一下-With epson m-150 printer communication, but some mistakes, hope you can correct me about

移植到51单片机的UIP代码，可以用51实现TCP/IP功能-Transplanted to 51 Singlechip UIP code, can be used 51 achieve TCP/IP functionality