摘要
随着电子技术的飞速发展，人们生活水平的提高及生活节奏的加快，家电产品是越来越深入人们的日常生活。本系统研究的内容就是以单片机为中心的洗衣机控制系统设计系统采用常见的价廉物美的ATMEL单片机AT89C51作为控制核心。为防止因电源过低或电源间断性供电而引起电脑工作状态混乱，设计了欠压检测保护电路。如有脱水误开盖或脱水不平衡等状况，蜂鸣器鸣叫，提示用户进行处理，保证洗衣机及人身安全。本设计按键较少，采用单端直接输入方式，使电路简单。功率驱动电路先由三极管进行电流放大后再加到继电器的控制极上，作为继电器的触发信号。由继电器实施对电动机、进水阀、排水阀的控制。显示电路采用三只发光二极管作程序选择键功能显示。电源电路经变压，整流，滤波后经三端集成稳压器7805输出稳定的5V直流电压，作为程序控制器的主电源。
关键词单片机；洗衣机；程序；电源
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