我自己做的给予ST公司的upsd3234a单片机的频率计。可以测量10K以下的频率。这是此频率计的自检程序，在KEIL上调试仿真通过。...

自制51编程器的资料是业余电子爱好者的工具，能让我们亲自制作一个51编程器。- The self-made 51 programming materials are the extra-curricular electronic amateur s tools, can let us personally manufacture 51 programming.

凌阳061a单片机的定时器使用例程。包括两个定时例子-Sunplus 061A routine use of single-chip timer. Includes two examples from time to time

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.

LCD的工作原理，包括LCD的液态晶体介绍，扫描技术，显示模块等等！-LCD working principle, including the LCD liquid crystal, the scanning technology, display modules and so on!

串口扩展LED时钟子程序，不含时间设定，可直接嵌入串口LED显示系统中-Serial LED clock subroutine expansion, excluding the time settings, can be directly embedded in the serial LED display system

本题必须采用广州周立功单片机发展有限公司赞助的ARM2138实验开发仪为主机板；并扩展显示器、键盘、打印机等相应接口；超市的物品使用13位数字编码（每件物品均有相对应的条形码）。 （1） 简易超市收银机具有可设置100个商品价目表（PLU），并具有掉电保护。商品的数字编号、品名（数字或英文字母）、单价等信息可输入；具有200条销售日志。 （2） 扩展键盘实现数字和英文字符输入； （3） 扩展打印机打印商品销售记录（包括售货日期、时间、商品名称、单价、合计等）； （4） 显示器上可通过键盘切换显示环境的温度，并可进行温度超限报警；（温度误差:

本文作者采用AT89C2051单片机和温度传感器DS18B20从硬件和软件两方面介绍了一款简易数字温度计的设计过程，  并对硬件原理图和程序流程图作了简洁的描述。数字温度计与传统的温度计相比，具有读数方便，测温范围广，测温准确，其输出温度采用数字显示，主要用于对测温比较准确的场所。-The author of this article using AT89C2051 MCU and temperature sensor DS18B20 from both hardware and software, introduced a simple digital thermometer of the design process, and schematic diagram of hardware and procedures were concise description of flow chart. Digital thermometer with a traditional thermometer, compared with a reading of convenience, a wide range of temperature measurement, temperature measurement accuracy, the output of the temperature digital display, mainly used for more accurate temperature measurement sites.

8bit adc This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation either version 2, or (at your option) any later version.-8bit adc This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation either version 2, or (at your option) any later version.

单片机控制8251a编程-SCM control 8251a Programming

本库函数实现了C8051F020 SMBUS总线的驱动 简洁规范的代码风格以及简单易用的接口不堪为一经典之作