3-digital-voltage-meter
代码说明：
51单片机运用PCF8591实现数模莫属转换（i2c协议） 1利用PCF8591 串行A/D 转换器转换电位器输入模拟电压，并在LED数码管上显示电压值（精确到2 位小数），实现数字电压表功能。 2在基本部分基础上，利用 PCF8591 的D/A 通道实现一个固定频率的方波（频率范围10~50Hz），并在虚拟示波器上输出。(51 MCU using PCF8591 to realize the digital to analog conversion (I2C) is 1 using PCF8591 serial A/D converter to convert the input analog voltage potentiometer, and in the digital tube LED display voltage values (accurate to 2 decimal places), the realization of digital voltage meter function. 2 in the basic part of basis, the realization of a fixed frequency Fang Bo using D/A channel PCF8591 (10~50Hz frequency range), and the output in a virtual oscilloscope.)
文件列表：
3数字电压表
...........\3.PWI,742,2015-01-14
...........\i2c.c,7837,2015-01-13
...........\I2c.DSN,153606,2015-01-14
...........\i2c.h,4031,2015-01-13
...........\I2c.PWI,1074,2015-01-14
...........\I2C.uvgui.MyPC,138051,2015-01-23
...........\I2C.uvopt,6225,2015-01-13
...........\I2C.uvproj,13967,2015-01-13
...........\ISIS.dmp,104103,2015-01-13
...........\Last Loaded I2c.DBK,153590,2015-01-14
...........\Last Loaded uart.DBK,165392,2015-01-11
...........\Listings
...........\........\I2C.m51,15397,2015-01-14
...........\main.c,3600,2015-01-14
...........\Objects
...........\.......\I2C,15349,2015-01-14
...........\.......\I2C.build_log.htm,790,2015-01-23
...........\.......\I2C.hex,4455,2015-01-14
...........\uart.PWI,886,2015-01-12
...........\设计.DSN,145328,2015-01-13
...........\设计.PWI,1026,2015-01-13
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