实用的空调计费系统，采用51系列单片机，编译软件KEIL C

简易数字电压表的设计,利用单片机AT89S51与ADC0809设计一个数字电压表，能够测量0－5V之间的直流电压值，四位数码显示，但要求使用的元器件数目最少。-Simple digital voltage meter design, the use of single-chip AT89S51 with ADC0809 to design a digital voltage meter, capable of measuring between 0-5V DC voltage value, four digital display, but requires the use of minimum number of components.

跑马灯程序，24个口全用-5,250 procedures, 24 throughout the mouth

功能完善的四层电梯程序。开门停8秒，上升或者下降一层用时5秒，有五秒倒计时数码管，楼层显示数码管，以及电梯内外楼层请求显示灯。-A well-functioning procedures for four-storey elevator. 8 seconds to open the door stopped, increased or decreased when a layer of 5 seconds, the 5 seconds countdown digital tube, digital tube display floor, as well as inside and outside the elevator floor indicator lights request.

GPL162001 I2C功能演示程序

keil C51 ISR事例-ISR stories

DS12CR887高精度万年历_C51程序-DS12CR887 high-precision calendar _C51 procedures

ISD4004程序的说明书及C语言驱动程序包-ISD4004 procedures manual and the C language driver package

用51单片机keilc编写的DDS并行编程，可以产生波形。-With 51 single-chip DDS prepared keilc parallel programming, can generate waveforms.

c8051f330单片机 用adc功能实现电位器调速-C8051F330 realize single-chip functions with adc potentiometer speed