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Description: 一个用门电路做的加、减计数器电路。非常简单好用。4年前在某单位做的。现在会单片机朋友不会再用这样的电路了，所以公开一下也没什么。
加一个电容后，掉电后，计数值在门电路中都还可以保存3天。-A gate circuit to do with add, subtract counter circuit. Very easy to use. 4 years ago for a unit to do. Plus a capacitor, the power-down, the total value in the gate circuit can also be preserved in all three days.
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Size: 17408 |
Author: 孙行者 |
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