The main purpose of such traffic-light-controllers is give us a sophisticated & advanced control & the organized to confirm that the movement of traffic is smooth, safe and sound as possible. The project uses light emitting diode (LED) for the purpose of indication & a micro-controller is utilized for automatic change of signals to mention range of time-interval. Light emitting diode (LED) get automatically turn on & off by making the corresponding port pins of the micro-controller “HIGH”. Here we will show you a
Working circuited of Traffic Light using 8051 Micro-controller.
Circuit Diagram Of Traffic Light Using 8051 Micro-controller
Working Criteria of the Traffic Lights Controller
As you see in above circuit diagram of traffic light there we used seven segment display that is used for counting display and we are using there Light emitting diode (LED) are used for controlling the traffic light. An Intel P8051 Micro-controller is the mind of all the circuit diagram & this micro-controller is used to causes the traffic signal at the crossing of road. This circuit is used a crystal-oscillator for creating some different type of vibration. Light emitting diode (LED) are connected to the zero (0) port of the micro-controller & are supplied power of 5v. Seven segment display is attached with the port 2 pins of the Intel P8051 micro-controller with some common setting of anode.
The Light emitting diode (LED) switch on & off automatically if we make the exactly that port pins of the Intel micro-controller “large”, based on this Intel P8051 micro-controller & its coding is complete by using software KEIL. At that time, only the green LED (light emitting diode) remains ON & other lights remain OFF & after later, the change-over of green to red in traffic light control, by making the changing into yellow color light emitting diode (LED). The timing for the changing of the light emitting diode can be shown by using the seven segment LEDs fashion & this process continues as a cycle.
We can enhanced the controlling of traffic signals automatically in traffic light controller, it is based on the flow of traffic on road by using infrared sensor(IR) it will automatically turn-off the traffic signals if there is no vehicle on road and the y consumed power.
Flow Based Traffic Light controller System
This is a sample of traffic Signal Controller is done by using infrared sensors (IR) and main part is Intel Micro-controller & light emitting diode (LED) with the help of all this component we will make the traffic light controller based on flow of traffic. The junction taken into intersection is a four sided junction on road with the flow of traffic on each side is only in one direction. There are three main component of traffic light control system consist is given below.
Display Unit: It is made up of three light emitting diode (LED): Red, Orange & Green on each side of the connection–a total of 12 light emitting diodes (LED) of three different colors are placed at the intersection of road.
Detector Unit: it is built by the combining of infrared sensor (IR) and light dependent resistor (LDR) at every intersection of road for identify the presence of vehicles. The presence is based on variation in resistance.
Controller-Unit: The control unit is consist of Intel micro-controller which receives the output from infrared sensor (IR) and they manage the glow of light emitting diodes that is total based on coding.Read>> simple LDR circuit automatic light system