Published February 9, 2016 © LGPL

Smart Traffic Lights for EMERGENCY Vehicles

In India there is no option in traffic lights to give way to emergency vehicle which is being implemented in this project

IntermediateFull instructions provided5 days2,905

Smart Traffic Lights for EMERGENCY Vehicles

Things used in this project

Hardware components

0 9 Transformer

Diode IN 4007

Capacitor 1000 µF

Capacitor 10 µF

Linear Regulator (7805)

10 mm Red LED

10 mm Yellow LED

10 mm Green LED

Resistance 10 k ohm

IC AT89C51

40 pin ic base

18 pin ic base

IC HT12D

IC HT12E

Tectile Switch (big 4 pin)

Capacitor 33pf

Crystal 11.0592 Mhz

General Purpose PCB (6inch x 4inch)

Connecting Wire (10 core)

4.7 K ohm Resistance Sip

5 mm LED: Red

Resistance 1.5 K ohm

Push to ON Switch

Rechargeable Battery (4.15V)

Resistance 51 K ohm

Resistance 1 M ohm

R F transmitter (4 pin, 434 Mhz)

R F Receiver (8 pin, 434 Mhz)

Hand tools and fabrication machines

Soldering iron (generic)

Story

This basic idea behind implementing the project is to give easy way to the EMERGENCY VEHICLE like Ambulance as there is no technique for this in Indian Traffic Lights.

Video for easy understanding

Here the traffic lights and the emergency vehicle are connected wirelessly by R F technology which has the range of 10 meter and we can increase the range by using other wireless technology like Zigbee.

Power Supply Design

The voltage requirement for the project is DC supply of 5 V for transmitter ambulance and the traffic light.

it is designed using step down transformer of 0 9 v and the bridge rectifier made of diode IN 4007, capacitor of 1000uf and regulator 7805.

You can also 5V DC adaptar or battery based supply if you required and in the ambulance 4.15 V rechargeable battery is also used to make it a mobile unit and it is properly working using the above mentioned battery.

Ambulance Section

There should be some signal from the ambulance or emergency vehicle that if they want the way or not.

So 434 Mhz frequency is used to wirelessly transmit the signal and there are switches on the ambulance for confirming the direction of Emergency Vehicle whether it is coming from North direction or any other section like here I have mention "A" on Switch provided on Ambulance and also on the traffic lights

Transmitter Section available on Emergency Vehicle

Microcontroller Section

The controller IC used here operates the traffic light and also receive the data from RF module and operate according to the requirement

R F receiver from where the data is received to microcontroller section

Traffic Light Section

These are the normal traffic lights but special alphabets like "A" and other are mention on it and similarly on the Emergency Vehicle to indicate them which switch to press. In practical this can be implemented by using boards which will display these alphabets.

Code

Smart Traffic Light

#include<reg51.h>

sbit r1=P1^0;
sbit y1=P1^1;
sbit g1=P1^2;
sbit c1=P0^4;

sbit r2=P1^3;
sbit y2=P1^4;
sbit g2=P1^5;
sbit c2=P0^3;

sbit r3=P2^0;
sbit y3=P2^1;
sbit g3=P2^2;
sbit c3=P0^2;

sbit r4=P2^3;
sbit y4=P2^4;
sbit g4=P2^5;
sbit c4=P0^1;

sbit c5=P0^0;

void main()
{
unsigned int a;
unsigned char b,c=0,d=0,e=0;
	while(1)
	{
	qwe:
	r1=0;
	y1=0;
	g1=1;

	r2=1;
	y2=0;
	g2=0;

	r3=1;
	y3=0;
	g3=0;

	r4=1;
	y4=0;
	g4=0;
	for(b=0;b<15;b++)
	for(a=0;a<40000;a++)
		{
		if(c5==1)
			{
			if(c1==1)
			goto qwe;
			if(c2==1)
			{
				e=1;
				goto wer;
			}
			if(c3==1)
			{
				c=1;
				goto wer;
			}
			if(c4==1)
			{
				d=1;
				goto wer;
			}
			}
		}

	wer:
	r1=0;
	y1=1;
	g1=0;

	r2=1;
	y2=0;
	g2=0;

	r3=1;
	y3=0;
	g3=0;

	r4=1;
	y4=0;
	g4=0;
	if(c==1 || d==1 || e==1)
	{
		for(a=0;a<40000;a++);
		goto mnb;	
	}
	for(b=0;b<2;b++)
	for(a=0;a<40000;a++)
		{
		if(c5==1)
			{
			if(c1==1)
			goto qwe;
			if(c2==1)
			goto tyu;
			if(c3==1)
			goto ert;
			if(c4==1)
			goto rty;
			}
		}

	mnb:
	if(c==1)
	{
		c=0;
		goto ert;
	}

	if(d==1)
	{
		d=0;
		goto rty;
	}
	e=0;

	tyu:
	r1=1;
	y1=0;
	g1=0;

	r2=0;
	y2=0;
	g2=1;

	r3=1;
	y3=0;
	g3=0;

	r4=1;
	y4=0;
	g4=0;
	for(b=0;b<15;b++)
	for(a=0;a<40000;a++)
		{
		if(c5==1)
			{
			if(c1==1)
			{
				c=1;
				goto asd;
			}
			if(c2==1)
			goto tyu;
			if(c3==1)
			{
				e=1;
				goto asd;
			}
			if(c4==1)
			{
				d=1;
				goto asd;
			}
			}
		}

	asd:
	r1=1;
	y1=0;
	g1=0;

	r2=0;
	y2=1;
	g2=0;

	r3=1;
	y3=0;
	g3=0;

	r4=1;
	y4=0;
	g4=0;
	if(c==1 || d==1 || e==1)
	{
		for(a=0;a<40000;a++);
		goto nbv;	
	}
	for(b=0;b<2;b++)
	for(a=0;a<40000;a++)
		{
		if(c5==1)
			{
			if(c1==1)
			goto qwe;
			if(c2==1)
			goto tyu;
			if(c3==1)
			goto ert;
			if(c4==1)
			goto rty;
			}
		}

	nbv:
	if(d==1)
	{
		d=0;
		goto rty;
	}

	if(c==1)
	{
		c=0;
		goto qwe;
	}
	e=0;

	r1=1;
	y1=0;
	g1=0;

	r2=1;
	y2=0;
	g2=0;

	r3=0;
	y3=0;
	g3=1;

	r4=1;
	y4=0;
	g4=0;
	for(b=0;b<15;b++)
	for(a=0;a<40000;a++)
		{
		if(c5==1)
			{
			if(c1==1)
			{
				c=1;
				goto zxc;
			}
			if(c4==1)
			{
				e=1;
				goto zxc;
			}
			if(c3==1)
			goto ert;
			if(c2==1)
			{
				d=1;
				goto zxc;
			}
			}
		}

	zxc:
	r1=1;
	y1=0;
	g1=0;

	r2=1;
	y2=0;
	g2=0;

	r3=0;
	y3=1;
	g3=0;

	r4=1;
	y4=0;
	g4=0;
	if(c==1 || d==1 || e==1)
	{
		for(a=0;a<40000;a++);
		goto bvc;	
	}
	for(b=0;b<2;b++)
	for(a=0;a<40000;a++)
		{
		if(c5==1)
			{
			if(c1==1)
			goto qwe;
			if(c2==1)
			goto tyu;
			if(c3==1)
			goto ert;
			if(c4==1)
			goto rty;
			}
		}
	bvc:
	if(d==1)
	{
		d=0;
		goto tyu;
	}

	if(c==1)
	{
		c=0;
		goto qwe;
	}
	e=0;

	rty:
	r1=1;
	y1=0;
	g1=0;

	r2=1;
	y2=0;
	g2=0;

	r3=1;
	y3=0;
	g3=0;

	r4=0;
	y4=0;
	g4=1;
	for(b=0;b<15;b++)
	for(a=0;a<40000;a++)
		{
		if(c5==1)
			{
			if(c3==1)
			{
				c=1;
				goto xcv;
			}
			if(c1==1)
			{
				e=1;
				goto xcv;
			}
			if(c4==1)
			goto rty;
			if(c2==1)
			{
				d=1;
				goto xcv;
			}
			}
		}
	xcv:
	r1=1;
	y1=0;
	g1=0;

	r2=1;
	y2=0;
	g2=0;

	r3=1;
	y3=0;
	g3=0;

	r4=0;
	y4=1;
	g4=0;
	if(c==1 || d==1 || e==1)
	{
		for(a=0;a<40000;a++);
		goto vcx;	
	}
	for(b=0;b<2;b++)
	for(a=0;a<40000;a++)
		{
		if(c5==1)
			{
			if(c1==1)
			goto qwe;
			if(c2==1)
			goto tyu;
			if(c3==1)
			goto ert;
			if(c4==1)
			goto rty;
			}
		}
	VCX:
	if(d==1)
	{
		d=0;
		goto tyu;
	}

	if(c==1)
	{
		c=0;
		goto ert;
	}
	e=0;

	}
}

Credits

Sumit Grover

8 projects • 31 followers

Smart Traffic Lights for EMERGENCY Vehicles

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Video for easy understanding

Power Supply Design

Ambulance Section

Microcontroller Section

Traffic Light Section

Schematics

Traffic Light Section

Ambulance or other Emergency Vehicle Section

Code