（论文 字数：２３１５页数：９）摘要：如何解决由于人不在家，所晾衣服被雨水淋湿的问题呢？作者利用义隆单片机EM78447A芯片设计出一种智能晾衣架，它能够自动识别晴天和雨天，智能地为我们服务。本文详细介绍该智能晾衣架的硬件电路（雨滴传感器、光照传感器、单片机硬件电路、电机驱动电路）的电路原理及其软件设计。

关键词：EM78447A 智能晾衣架,设计

Abstract: How solve the problem that the clothes being dried in the sun are soaked by rain when you are absent? In order to do that, The author designed a kind of intelligent clothesrack which can distinguish sunny days from rainy days automatically by using righteousness prosperous monolithic integrated circuit EM78447A chip , the intelligence serves for us. In this article the hardware electric circuit (raindrop sensor, illumination sensor, monolithic integrated circuit hardware electric circuit, motor-driven electric circuit) principles of the intelligent clothesrack and its software designing are detailed

Key word: The EM78447A, intelligent clothesrack, design

目录

1．设计思路
2．硬件电路设计
3．软件设计
4．结束语

1． 设计思路
利用EM78447A单片机作为智能晾衣架的核心控制芯片。该芯片是台湾义隆公司推出的8位单片机。其主要特点是：它的内部包括算术逻辑单元（ALU）、容量为4K*13的只读存储器（ROM）、20个输入/输出（I/O）、148个通用数据寄存器可直接寻址使用、9个特殊功能寄存器、具有五级堆栈，具有编程简单、外围电路简单、可靠性高，而价格便宜等优点。