脉冲数检测电路，输入的脉冲已组打包，并显示在数码管上，当计入到5000个脉冲后，停止，在各个脉冲阶段，实现不同的脉冲输入，输出控制信号，控制其他的信号。-Pulse number detecting circuit, the input of the pulse group has been packaged and displayed in the digital tube, when added into the 5000 pulse, stop, in each stage of the