断电可保持计数值，通电后继续计数，如达到计数次数，可通过清零按纽清零。
Without electricity can keep count value, after electrify continue to count, such as frequency, can achieve count by reset button reset.
第三部分由0开始，循环进位，直到进位满了之后再清零，重新开始计数。
The third part begins with 0, does end-round carry, clears when the carry is full and restarts counting.
单片机控制电路以AT89C51单片机为核心部件，实现了数据采集、通讯及计数模块清零等功能。
The data collections, communications and counter module clearing are realized by controller circuit. The core of the controller circuit is AT89C51 single chip.
应用推荐