交通信号控制机是前端信号灯控制设备,对保障交通安全畅通,减轻交通管理人员劳动强度起着十分重要的作用。为使信号机脱离市电工作,可采用太阳能供电。因此,低功耗成为信号机的一个基本要求。系统在硬件上采用超低功耗单片机MSP430作为核心CPU,软件上采用脉宽调制方式控制信号灯在不同环境亮度下的工作电流等方法,以实现低功耗的目的。 Traffic signal control machine is a front-end signal light control equipment, to ensure traffic safety and relieve the labor intensity of traffic management plays a very important role. To make the signal from the mains work, solar power can be used. Therefore, low power consumption becomes a basic requirement of the signal machine. The system uses ultra-low power single-chip MSP430 as the core CPU in hardware, and uses pulse-width modulation to control the operating current of the signal light under different ambient brightness in order to achieve the purpose of low power consumption.