PWM

zigbee document upload 23/7/2019

数字电子钟，单片机控制，可以设置时间，并且进行时钟计时(Digital electronic clock, microprocessor control, you can set the time and the clock time)

基于STC89C52写的蜂鸣器唱歌程序，可以控制开发板上的蜂鸣器唱歌，适合初学者(Based on the STC89C52 write buzzer singing procedures, can control the development board of the buzzer singing, suitable for beginners)

说明：  本程序是st7567驱动12864液晶显示采样串行方式驱动程序(This program is st7567 LCD driver 12864 driver serial sampling)

本程序利用51单片机的定时器中断产生时间信号，同时具有通过按键调节时间的功能，还可设置闹钟(This procedure using 51 single-chip timer interrupt time signal, but also has the functions via buttons adjust the time, but also set the alarm)

说明：  　　 paek变换 park转换，也称派克变换，英文为Park transformation,为现在占主流地位的交流电机分析计算时的基本变换。在电力系统分析和计算中，park转换具有重要的理论和实际意义。(paek transform park conversion, also known as Park transformation, the English for the Park transformation, for the now dominant in the calculation of AC motor analysis of the basic transformation. In power system analysis and calculations, park conversion has important theoretical and practical significance.)

单片机SCM处理信号的自动聚焦系统，利用单片机SCMM控制光学镜头，实现自动聚焦功能， (MCU SCM processing a signal automatic focusing system, the use of the microcontroller the SCMM to control the optical lens, to achieve auto-focus function,)

按键控制LED灯的汇编程序，可实现按键控制LED灯的亮灭，主要是用汇编语言写的可以学习汇编(Button control keys to control LED lights LED lights LED light button control keys to control LED lights)

两个12V的电机驱动履带式底盘完成到制定目标运动的任务，可以通过点触屏进行无线控制。(Two 12V motor-driven crawler chassis complete the task of setting the target motion, which can be controlled by wireless touch screen.)

温度传感器，基于51的温度传感器！献给予51的爱好者们！(Temperature sensor, temperature sensor based on 51! Offered to give 51 fans!)