用KEIL C编写的数码管程序，使用到max7219芯片，并用proteus仿真。-KEIL C written by digital programs that use the max7219 chip, and use proteus simulation.

利用51单片机控制max7219和数码管制作的十字路口交通灯，红绿灯时间可调，包含C文件，proteus文件和hex文件-The use of 51 single-chip control the max7219 digital pipe production at the crossroads of traffic lights, traffic lights, time is adjustable, contains C files proteus file and the hex file

在PROTEUS环境下，利用DS1302实时钟芯片实现时间、日期的显示，并且具有调节时间、日期的功能，显示用共阴极LED显示。用串行芯片MAX7219驱动LED显示.-The PROTEUS environment DS1302 real-time clock chip time, date display and adjust the time, date display with common cathode LED display. Drive serial chip MAX7219 LE

基于AT89C51+MAX7219的频率计 附带proteus仿真电路图 实际硬件电路测试通过-FREQ design Base on AT89C51+MAX7219,include sim DSN and hardware SCH

基于AT89C51+MAX7219的频率计 附带proteus仿真电路图 实际硬件电路测试通过- U57FA u4E8EAT89C51+MAX7219 u7684 u9891 u7397 u8641 u9644 u5E26proteus u4EFF u771F u7535 u8DEF u56FE u5B9E u9645 u786C u4EF6 u7535 u8DEF u6D4B u8BD5 u901A u8FC7