说明：  AN2103 基于 GUTTA 一步一步实现一个最小 PLC 系统 实现一个自己的 PLC 其实不难（要实现一个功能全面的商业化 PLC 系统还是有难度的）， 只要你懂 C 语言、 会用某款单片机、 同时熟悉基本的 I/O 电路、而且有这方面的兴趣（这个 最关键），你就可以做到。
(AN2103 based on GUTTA step by step to achieve a minimum PLC system To achieve their own PLC is not difficult (to achieve a full-featured commercial PLC system or difficult), As long as you understand the C language, will use a single chip, at the same time familiar with the basic I/O circuit, but also have the interest in this area The most critical), you can do.)