19-04-2017, 07:04 PM
[b] [/b]Hi am salma i would like to get details on algorithm for traffic light controller using 8051 ..My friend Justin said algorithm for traffic light controller using 8051 is available here
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algorithm for traffic light controller using 8051
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[b] [/b]Hi am salma i would like to get details on algorithm for traffic light controller using 8051 ..My friend Justin said algorithm for traffic light controller using 8051 is available here
25-04-2017, 09:16 AM
The semaphore system was one of the fascinating applications of embedded systems and they have been using it to this day. I have previously posted a simple traffic light system for one way roads with small check times if you are interested in it. This is the four-way traffic light system that uses embedded systems that was not very complex in nature because we have to consider the flow of traffic in four different directions providing appropriate times for each of the lights.
This system uses 8051 microcontrollers (AT89C52), 7 segments and LED's for indication. The LEDs that were used as lights were connected to the microcontroller by means of the common anode configuration. In this configuration the microcontroller was used to sink the current of the LED to its ports. This means that the logic 0 signal on the microcontroller switches the LED ON and the logic signal 1 turns off the LED. Here we are using 6 MHz crystal for the 8051 microcontroller operation and we can use up to 12MHz crystal with this controller.
TRAFFIC LIGHT INTERFACE WITH 8051
The semaphore controller section consists of 12 N-point LEDs which are arranged by 4Lanes on the semaphore interface card. Each lane has the Go (Green), Listen (Yellow), and Stop (Red) LEDs placed.
This system uses 8051 microcontrollers (AT89C52), 7 segments and LED's for indication. The LEDs that were used as lights were connected to the microcontroller by means of the common anode configuration. In this configuration the microcontroller was used to sink the current of the LED to its ports. This means that the logic 0 signal on the microcontroller switches the LED ON and the logic signal 1 turns off the LED. Here we are using 6 MHz crystal for the 8051 microcontroller operation and we can use up to 12MHz crystal with this controller.
TRAFFIC LIGHT INTERFACE WITH 8051
The semaphore controller section consists of 12 N-point LEDs which are arranged by 4Lanes on the semaphore interface card. Each lane has the Go (Green), Listen (Yellow), and Stop (Red) LEDs placed.
Circuit Diagram:
![[Image: Density-Based-Traffic-Lights-System-Circ...24x552.jpg]](http://www.electronicshub.org/wp-content/uploads/2014/06/Density-Based-Traffic-Lights-System-Circuit-Diagram-1024x552.jpg)
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