How To Control Traffic by Using 8051 Microcontroller

This is a method to control the traffic using 8051 microcontroller, 2 switches and green, yellow and red LEDs.

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How To Control Traffic by Using 8051 Microcontroller

Things used in this project

Hardware components

Microchip 8051 microcontroller

Male Header 40 Position 1 Row (0.1")

SparkFun Pushbutton switch 12mm

LED (generic)

Hand tools and fabrication machines

Soldering iron (generic)

Story

We have used 2 switches. If we press switch one, the first signal blinks green light and the second signal blinks the red light. The green light means the vehicle will go and the red light means all vehicles will stop.

8051 micro controller based traffic light control

org 0x00

suria:
jnb p1.1,l1
jnb p1.2,l2
jmp suria                                                                                           
l1: 
setb p2.2 
setb p2.3
clr  p2.5
call delay
setb  p2.5
clr  p2.4
setb p2.3 
clr p2.1
setb p2.2
setb p2.5                                                                                      
jmp suria
l2:
setb p2.4
setb  p2.1
clr p2.6
call delay
setb p2.6
clr p2.3
setb p2.1
clr p2.2
setb p2.4
setb p2.5
jmp suria                         


delay:
mov r1,#7
l13: mov r2,#255
l12: mov r3,#255
l11: djnz r3,l11
djnz r2,l12
djnz r1,l13  
ret   
end