基于LM的电压变指示器的设计与制作.docVIP

- PAGE 1 - 毕业设计（论文） 题 目 基于 LM 3914的电压变指示器的设计与制作 姓 名 朱 骞 学 院 信息工程学院 专 业 09机电一体化 班 级 2班 指导 教师 刘铁生 提交 时间 2011年 11 月 日 论文题目：基于 LM 3914的电压变化指 示器的设计与制作 姓 名：朱骞 班 级：09机电一体化2班 指导教师：刘铁生 摘要：19世纪兴起的数字电路以其先天的便捷、稳定的优点在现代电子技术电路中占有越来越重要的地位。随着人们生活环境的不断改善和美化，在许多场合可以看到彩色流水灯。LED彩灯由于其丰富的灯光色彩，低廉的造价以及控制简单等特点而得到了广泛的应用，用彩灯来装饰街道和城市建筑物已经成为一种时尚。但目前市场上各式样的LED彩灯控制器大多数用全硬件电路实现，电路结构复杂、功能单一，这样一旦制作成品只能按照固定的模式闪亮，不能根据不同场合、不同时间段的需要来调节亮灯时间和变化。 本实验设计中，音频变色灯由该放大电路采用三只三极管及外围电路、LED电平指示器LM3914组成,通过音频信号可以自动对彩灯或霓虹灯及节日灯的控制。音频变色等控制电路可在音频信号的驱动下，控制三基色，从而达到彩灯泡发出千姿百态的色彩变化，其变化规律与音频信号的频率及电平大小相对应。在这样灯光可实现跳变、缓变、定色、组图、照明五种形式，适用于家庭、宾馆、舞厅、剧院、广告等领域，用途广泛，丰富现代社会生活。 关键字：音频变色灯 LM3914 音频信号 In nineteenth Century the rise of digital circuit with its innate convenience, the advantages of stability in modern electronic technology circuit plays an increasingly important role in. As peoples living environment of continuous improvement and landscaping, on many occasions can see color light water. LED lantern due to its rich color of light, low cost and simple control features and widely used, decorated with lanterns to streets and buildings of the city has become a kind of fashion. But the market of type LED lantern controller most full implementation of hardware circuit, complicated circuit structure, single function, such as the production of finished products only in accordance with the fixed pattern of shining, not according to different situations, different time needs to regulate the lighting time and change. This experimental design, audio lamp by the amplifying circuit adopts three three triode and a peripheral circuit, LED level indicator LM3914 composition, through the audio signal can be automatically the lantern or neon lights and holiday lights control. Audio control circuit can change the audio signal drive, control of three primary colors, so as to achieve color light bulb in