the low voltage Flash Atmel AT89C52 and AT89LV52. Keil Software,

简易电子琴的设计 一、 设计题目： 设计一简易电子琴，要求能够发出1、2、3、4、5、6、7等七个音符。 使用元件：AT89C51、LM324，喇叭，按键等 二、 设计目的 （1）能够对电子电路、电子元器件、印制电路板等方面的知识有进一步的认识，独立对其进行测试与检查。 （2）熟悉8051单片机的内部结构和功能，合理使用其内部寄存器，能够完成相关软件编程设计工作。 （3）为实现预期功能，能够对系统进行快速的调试，并能够对出现的功能故障进行分析，及时修改相关软硬件。 （4）对软件编程、排错调试、焊接技术、相关仪器设备的使用技能等方面得到较全面的锻炼和提高。-simple design of a flower, a design : a simple flower design, request, sent seven notes. Use Element : AT89C51, LM324, speakers, such as two keys, designed (a) to be able to electronic circuits, electronic components, such as printed circuit boards with the knowledge to further understanding of its independent testing and inspection. (2) familiar with the 8051"s internal structure and function and the rational use of its internal registers can be completed software programming design work. (3) To achieve the desired functionality, the system can quickly debugging, and the right to function failure analysis, the timely revision of the related hardware and software. (4) The right software programming, debugg

实现电动机的软启动控制，modbus通信，LCD带字库显示，软件容错和抗干扰设计不错-Achieve soft-start motor control, modbus communication, LCD display with font, software fault-tolerance and anti-jamming design good

4×4矩阵键盘键值LCD1602显示（汇编语言）,单片机的键盘基础设计-4 × 4 matrix keyboard key LCD1602 display (assembly language), single-chip based on the design of the keyboard

一个能够控制抽油烟机定时开关及风速调节的程序-A timer switch to control the range and speed adjustment procedures

利用LPC2131做的ZLG7290显示程序，采用IIC总线！-LPC2131 make use of the ZLG7290 display procedures, the use of IIC bus!

R8C/1A、1B是瑞萨公司的单片机。这是R8C/1A与ATC2402的IIC通信源代码。-R8C/1A, 1B is the Renesas microcontroller. This is the R8C/1A the IIC communication with the ATC2402 source code.

upd6453是NEC 的一颗OSD芯片,这是它的中文文档,还有开发的例子,下载了它,不用再为看几十页的英文头疼了,可以省你很多的时间.-upd6453 is the NEC" s an OSD chip, which is its Chinese documents, as well as the development of an example, download it, do not have to read dozens of pages of the English as a headache, and can save you a lot of time.

在LED上显示中文汉字的源代码，采用汇编语言，对于入门者帮助很大。-LED display Chinese characters in the source code, using assembly language is very helpful for beginners.

PWM温度控制的，将风扇等制冷设备连接到单片机的指定IO口上即可实现设备输出功率的人工控制。-PWM temperature control, refrigeration equipment, such as the fan is connected to MCU IO port on the specified equipment to achieve the artificial control of output power.

DK3400_3420 USB R_W source code - Keil-DK3400_3420 USB R_W source code- Keil