i'm doing the pedestrian traffic light system and in need of the coding in keil. is there anyone that can help me. please, i really need it >.<

Traffic light system was one of the fascinating applications of Embedded systems and have been using the same till this day. I have previously posted a simple Traffic light system for one way roads with small timings check it out if you are interested in it. This is the four way traffic light system using embedded systems which was bit complex in nature as we need to consider the traffic flow in four different directions providing appropriate timings to each of the lights.

This system uses 8051 microcontroller ( AT89C52) , 7-segments and LED’s for indication. The LED’s which was used as lights was connected to the Microcontroller by means of common Anode configuration. In this configuration the Microcontroller was used to sink the current from the LED to its ports. That means logic 0 signal in the Microcontroller switches the LED ON and logic 1 signal switches the LED off. Here we are using 6 MHz crystal for the 8051 Microcontroller operation and you can use upto 12MHz crystal with this controller.