ESP_8266 测试板原理图和PCB源文件

说明：  它是关于80C51单片机的原理介绍和使用其开发的过程，有具体的实例。(It was introduced on the 80C51 microcontroller and use the principle of its development process, with specific examples.)

基于MSP430的可以测量方波的相位差的程序，精确到小数点后3位，double型数据(msp430 相位差测量)

说明：  电位器输入电压信号，经过ADC转换作为PWM的控制信号，可连续调节直流电机转速(Potentiometer input voltage signal, the ADC conversion as the PWM control signal, Adjustable Speed DC Motor)

基于stc12和AD8232的心电图仪，可显示心电图(ECG can be displayed on the basis of STC12 and AD8232.)

步进电机驱动 EM-44步进电机 lcd1602显示 按键控制(step motor driver)

松翰单片机2711B用于移动电源充电，程序包括电池的预充电，恒流充电，恒压充电，放电状态的大电流保护，电池低电压保护。无负载自动关机。跑马灯指示灯电量指示程序。(Sonix microcontroller 2711B for mobile power charging, the program includes pre-charge the battery, constant current charging, constant voltage charging, high-current protection, low battery voltage protection discharged state. No load automatically shut down. Marquee battery indicator lights program.)

LED显示屏3，软件理解研究等，互相学习(3 LED display, software research to understand, learn each othe)

使用单片机任意IO口用软件的方法模拟实现异步串行数据传输的方法，并采用多次采样软件方法来增加软件模拟串口通讯的可靠性，在以上基础上，进一步用具有中断功能的IO口来实现数据的接收，从而增加软件模拟方式的实用性和灵活性；(The use of single-chip arbitrary IO port with the method of software simulation method to realize asynchronous serial data transmission, and the reliability of software sampling method to increase the software simulation of serial communication, on the basis of the above, further with interrupt function of IO port to realize the data receiving, thereby increasing the practicability and flexibility of software simulation method;)

PID调节器参数优化设计的一种改进方法...(PID controller parameter optimization of an improved method)

配置系统的时钟，用于单片机的学习，基于开发板LPC1114,程序虽然比较小，却是一个完整的模块，可以作为一个模板，在此基础上添加其他外设及相关编程。(Configuring the clock of the system is used for the learning of MCU. Based on the development board LPC1114, the program is relatively small, but it is a complete module, which can be used as a template, on which other peripherals and related programming are added.)