摘要：Traffic lights are a series of electronic equipment that is used to manage trafficon the highway. The output of LED red, yellow and green. The circuit isexpected to set the order of vehicles on the road tigaan crossroads. Motoristsmay feel the time stops and time to walk the same and not look at the existinglevel of density. This traffic lights using AT89C51 microcontroller. This tooluses a clock as a decisive turn of speed led the so-called crystal. Led will lightalternately determined by time delay. We can decide how we want a delay.
