摘 要本设计完成了以 AT89S52 单片机和 DAC0832 数模转换芯片为核心的 LED 路灯低功耗智能控制装置。该设计由供电模块、LED 恒流驱动电源模块、单片机控制模块、路灯信号检测模块、LCD 显示模块、声光报警模块、按键模块、温度感应模块组成。单片机根据声光传感器对路边状况的检测和时钟芯片 DS12C887 设置的时间来控制 D/A 转换芯片,与 LED 恒流驱动共同实现 LED 路灯亮度的自动调节，通过控制继电器实现 LED 路灯的开关，并用二极管组成保护电路。开灯、关灯时间以及即时时间动态显示。当路灯出现电路故障时，还会出现声光报警。 论文详细论述了控制系统的组成、相关硬件和软件的设计、工作原理。重点介绍了如何运用 AT89S52 控制 DAC0832 芯片实现 LED 驱动电路。关键词 恒流驱动；电路故障；液晶显示；保护电路；声光控制AbstractThe core LED street lamp low power consumption intelligent control device is completed with AT89S52 SCM and DAC0832 analog-to-digital conversion chips. The design is composed of power supply module, LED by constant current drive power supply module and single-chip microcomputer control module, street lamp signal detection module, LCD display module, sound and light alarm module, key module, temperature sensing module. SCM is according to sound and light sensor to curb status of detection and clock chip DS12C887 setup time to control the D/A conversion chip and LED constant current driver together to accomplish the street lamp brightness LED the automatic adjustment,through the realization of the control realy LED lamp switch,and of the diode protection circuit. Turn on the light, turn off the lights and instant time to get the time dynamic display.When street light appeared circuit fault, the design also can appear sound and light alarm.The control system of the composition, the hardware and software of the relate design and work principle are introduced in the paper. And the method of how to use ...
