显示4位时钟表 精确到um的 比较精简的代码-Streamlined code to display the watch is accurate to 4 um

电子怀表PCB，ATmega16A控制130个灯，从ds1302读取时间控制灯的点亮，实现钟表功能，效果非常好看。-Electronic pocket PCB, ATmega16A control 130 lamp, reading lamp lighting time control ds1302, timepiece function, the effect is very nice.

Arduino，机器人钟表万年历编程，法国UTBM学校项目-Arduino, robot programming calendar clocks, France UTBM school project