《LED旋转显示器的设计》》-毕业论文.doc

LED旋转显示器的设计 摘要 基于视觉暂留原理，开发出了一种旋转式LED显示屏。在稳定旋转地载体上安装16个LED发光器件，静止时，各列发光管等间距分列排开，随着扫描速度的加快，在计算机软件精确的时序控制下，不断扫描出预设的文字，图案等。磁钢用来完成同步的。当霍尔传感器旋转到磁钢处，感应到它的存在就会恢复到最初状态，即使前一个过程没有显示完成。装在电机上的电路始终在高速旋转，我们就无法使用通常的方法来给电机供电，但可以通过对220V电压降压来完成。交流电压通过变压器降为9V，再通过桥式整流和7806降为6V，供直流电机使用。采用时钟芯片DS1302以及电池能准确显示时、分、秒。 关键字：视觉暂留，直流电机，桥式整流。 LED Rotating Display Abstract Based on the persistence of vision principle, developed a rotating LED display. Vector rotation in a stable way to install a LED light-emitting device, static when glibenclamide LED rows equally spaced points, with the scan rate speeds up, the computer software under the control of precise timing, and constantly scan the default text, patterns and so on. Magnet is used to complete the synchronization. When the Hall sensor to a rotating magnet Division, induction into its existence will be restored to its original state, even if the former does not show the completion of a process. Installed in the motor circuit is always in high-speed rotation, we can not use the usual method to give electrical power supply, but can be done step-down voltage of 220V. AC voltage through the transformer reduced to 9V, then through the bridge rectifier and 7806 fell to 6V, for the use of DC motors. It uses DS1302 to display hour, minute and second excellently. Key words: persistence vision, DC motor, Bridge rectifier. 目 录 TOC \o 1-2 \u 摘要 PAGEREF _Toc250901946 \h I Abstract PAGEREF _Toc250901947 \h II 目 录 PAGEREF _Toc250901948 \h III 引言 PAGEREF _Toc250901949 \h 1 1 系统硬件电路的设计 PAGEREF _Toc250901950 \h 1 1.1 系统硬件框图 PAGEREF _Toc250901951 \h 1 1.2 主控单元 PAGEREF _Toc250901954 \h 2 1.3 驱动模块 PAGEREF _Toc250901955 \h 5 1.4 霍尔传感器模块 PAGEREF _Toc250901956 \h 6 1.5 显示模块 PAGEREF _Toc250901957 \h 8 1.6 电源模块1 PAGEREF _Toc250901958 \h 10 1.7 电源模块2 PAGEREF _Toc250901959 \h 11 2 系统程序的设计 PAGEREF _Toc250901960 \h 12 2.1 程序的分步完成 PAGEREF _Toc250901961 \h 12 2.2 程序流程图 PAGEREF _Toc250901962 \h 12 3 性能调试与分析 PAGEREF _Toc250901963 \h 13 3.1 程序的检查与修改 PAGE