光伏交通指示牌设计

AbstractIn this paper,a photovoltaic traffic indicator controller with a combination of timecontrol and light control is designed.The lighting time of the traffic indicator iscontrolled by single-chip microcomputer STC12C2051 and clock chip DS1302.Thelighting time of the traffic indicator is stored by low-power data storage 24C02.Whenthe light is dark in the evening,the controller will automatically switch on the powerof the traffic sign.When pedestrians are young at night,they will turn off the trafficsign according to the set time.In the morning,the controller will turn on the powerautomatically and light up the traffic sign.The circuit composition and workingprinciple of the controller are analyzed in detail.Photovoltaic traffic signs are composed of photovoltaic cells,batteries,high-brightness leds,controllers and other components to reduce noise pollution:photovoltaic traffic signs have few moving parts and almost no noise.Key words:photovoltaic cell;The LED;Lead acid battery;Time control,lightcontrol circuit;Charge discharge controller