一个秒表的硬件设计，学习数字电路中基本RS触发器、单稳态触发器、时钟发生器及计数、译码显示等单元电路的综合应用。-The hardware design of a stopwatch, learn basic digital circuit in the RS flip-flops, monostable multivibrator, the clock generator and counting, decoding display unit integrated circuit applic

实现秒表时间日期显示调整功能及整点定时功能的电子时钟-Realize the time and date display Stopwatch function and adjust the whole point of the electronic clock timer

两个可用的单片机程序程序及原理图--希望用7.5版本的protues仿真 时钟秒表电路和温度计电路程序-Two available microcontroller program procedures and schematics- want to use the 7.5 version protues simulation clock stopwatch circuit and thermometer circuit program