学习电气要懂数字电路，数字电路得学习逻辑函数的卡诺图化简法,^_^，这篇文章易懂，是学习的好资料。-Learning to understand the number of electrical circuits, digital circuits have to learn from the Karnaugh map logic functions Simplification Act ,^_^, this article easy to understand, good information to learn.