秒表/时钟计时器的设计采用AT89C52单片机，最小化应用设计；采用共阳七段LED显示器，P0口输出段码数据，P2.0-P2.5口作列扫描输出，P1.0、P1.1、P1.2口接三个按钮开关，用以调时及功能设置。为了提供共阳LED数码管的驱动电压，用三极管8550作电源驱动输出。-Stopwatch/Clock timer AT89C52 single-chip design, the smallest of the application of design　the use of a total of Seven-Segment LED display Yang, P0 paragraph code output data, P2.0-P2.5 I make out scanning output, P1.0, P1.1, P1.2 I take three buttons switch to tune and when the feature set. In order to provide a total of Yang LED digital tube of driving voltage, using 8550 as the power transistor output driver.相关搜索： 89c52
LED
计时
秒表
timer
stopwatch
at89c52
计时器
单片机
秒表
计时器
单片机
单片机
计时器
设计
单片机
秒表