measure coin used 89c52, which use two Timers

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ds18b20的程序，经过测试可以使用分享一下-DS18B20 procedures tested can use to share

51单片机矩阵键盘的设计与调试，建议使用52单片机。-51 Single-chip design of the keyboard matrix and debugging, it is recommended to use single-chip microcomputer 52.

介绍了DS1991信息按钮在文章中的应用，对编译中使用的读写程序作了说明。

51单片机的一些常用程序代码51C51源代码-51 SCM 51C51 some commonly used code source code

温度测量程序，包括显示、数据采集、进位、延时、数摸转换-temperature measurement procedures, including display, data acquisition, rounding, delay, a few touch conversion, etc.

AVR单片机16位CRC校验码生成及CRC校验子程序-AVR 16 CRC generation and CRC Subroutine

对初学者会有用。主要针对于西门子STEP7组态编程的实践程序。软件平台《step7v5.3》-Be useful for beginners. The main target in the configuration of Siemens STEP7 programming practice procedure. Software platform

系统能够产生正弦波、方波、三角波。同时还可以作为频率计测频率。函数信号的产生由MAX038和外围电路完成，能产生1Hz―20MHz的波形。-system can produce sine, square, triangle wave. Also as frequency measurement frequency. Signals generated by the MAX038 completed and the external circuit, which can produce 1Hz- 20MHz waveforms.

单片机C8051F221读取DS18B20温度值，温度显示在液晶屏屏LCM046上，单片机根据温度值来控制风扇的关和开。-C8051F221 Singlechip DS18B20 read temperature value, temperature displayed on the LCD screen LCM046, the single-chip microcomputer according to the temperature value to control the fan and open relationship.