How to make parking assistance system using arduino



Materials:-

  • Arduino uno
  • Dot board
  • Ultrasonic Sensor
  • Jumper wires
  • LED*5
Diagram:-

Connections:-

Ultrasonic to Arduino 
  • Ultrasonic VCC pin - Arduino 5V PIN 
  • Ultrasonic trig pin - Arduino digital pin 8
  • Ultrasonic Echo pin- Arduino digital pin 7 
  • Ultrasonic GND - Arduino GND 
LED to Arduino
  • LED(1) - Arduino digital pin 13
  • LED(2) - Arduino digital pin 12
  • LED(3) - Arduino digital pin 11
  • LED(4) - Arduino digital pin 10
  • LED(5) - Arduino digital pin 9
Code :-

#define trigpin 8 //define pins
#define echopin 7 
int led1 = 13; 
int led2 = 12; 
int led3 = 11; 
int led4 = 10; 
int led5 = 9;
void setup()
{
Serial.begin(9600);
pinMode(trigpin, OUTPUT);
pinMode(echopin, INPUT);
  pinMode(led1, OUTPUT); 
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  digitalWrite(led1, LOW); 
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);

 delay(1000); 
}

void loop()
{
 int duration, distance;
 digitalWrite(trigpin, HIGH);

delayMicroseconds(1000);  
digitalWrite(trigpin, LOW);


duration = pulseIn(echopin,HIGH);

distance = ( duration / 2) / 29.1;
Serial.println("cm:"); 
Serial.println(distance);


if(  (distance > 0) && (distance <= 4)   ) //you can free to change this 
{
  digitalWrite(led1, HIGH); 
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH); 
} else
if(  (distance > 4) && (distance <= 8)  ) 
{

  digitalWrite(led1, LOW); 
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH); 

} else

if(  (distance > 12) && (distance <= 16)  ) 
{

  digitalWrite(led1, LOW); 
  digitalWrite(led2, LOW);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
} else

if(  (distance > 16) && (distance <= 20)  ) 
{

  digitalWrite(led1, LOW); 
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
} else

if(  (distance > 20) && (distance <= 25)  ) 
{

  digitalWrite(led1, LOW); 
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, HIGH);
} else

if(  distance > 25 ) 
{

  digitalWrite(led1, LOW); 
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
}
}