Introduction - If you have any usage issues, please Google them yourself
Crossroads traffic light control system, LED light-emitting diode on the experimental platform to display the vehicle direction (east-west and north-south through the group), the direction of the remaining time with digital display. Requirements: The work order for the east-west direction the red light for 45 seconds, 40 seconds before the green light north-south direction, 5 seconds after the yellow light. North-south direction then the red light 45 seconds, 40 seconds east-west direction green light, yellow light after 5 seconds. Turn repeat. Allow a direction has been given the green light or red light, emergency addition allows the two directions are red light, vehicles forbidden line of a particular situation, such as the crossroads vicious accident, something from north to south in both directions have two digital tube time display of the direction of the lighting time.