DIY Security Alarm using LCD and Ultrasonic Sensor

1//Author:  Krishna Agarwal
2//For any Query/ Help Comment Below
3#include<LiquidCrystal.h>
4
5int   trig = 8;
6int echo = 7;
7long duration;
8int distance;
9int ledPin1=6;
10int   ledPin2=9;
11int ledPin3=12;
12int ledPin4=13;
13int norisk=A2;
14int buzz=A0;
15LiquidCrystal   lcd(11, 10, 5, 4, 3, 2);
16
17void setup()
18{
19pinMode(trig, OUTPUT);
20pinMode(echo,   INPUT);
21lcd.begin(16, 2);
22//pinMode(A5, INPUT);
23Serial.begin(9600);
24pinMode(ledPin1,OUTPUT);
25   pinMode(ledPin2,OUTPUT);
26  pinMode(ledPin3,OUTPUT);
27  pinMode(ledPin4,OUTPUT);
28   pinMode(norisk,OUTPUT);
29  pinMode(buzz,OUTPUT);
30  lcd.begin(16,2);
31  lcd.print("Starting   System");
32    delay(1500);
33    lcd.clear();
34    lcd.print("System On");
35     delay(4000);  
36} 
37
38
39void loop()
40{
41
42  digitalWrite(trig,   LOW);
43    delayMicroseconds(5);
44    digitalWrite(trig, HIGH);
45    delayMicroseconds(10);
46     digitalWrite(trig, LOW);
47  
48    duration = pulseIn(echo, HIGH);
49    distance   = duration*0.034/2;
50     
51    Serial.print("Distance:");
52    Serial.println(distance);
53   
54 
55  
56  if (distance <= 25){
57    
58  lcd.setCursor(0,0);
59  lcd.print("Extreme   Risk");
60    lcd.setCursor(0,11);
61    lcd.print("Glowing 4 LED");  
62     digitalWrite(ledPin1, HIGH);
63      digitalWrite(ledPin2, HIGH);
64    digitalWrite(ledPin3,   HIGH);
65    digitalWrite(ledPin4, HIGH);
66    digitalWrite(norisk, LOW);
67     tone(buzz,900);
68  delay(100);
69  noTone(buzz);
70  delay(100);
71  }
72   else if (distance >= 26 && distance <=100){
73    lcd.setCursor(0,0);
74  lcd.print("High   Risk");
75    lcd.setCursor(0,11);
76    lcd.print("Glowing 3 LED");  
77     digitalWrite(ledPin1, HIGH);
78      digitalWrite(ledPin2, HIGH);
79    digitalWrite(ledPin3,   HIGH);
80    digitalWrite(ledPin4, LOW);
81    digitalWrite(norisk, LOW);
82   tone(buzz,900);
83  delay(700);
84  noTone(buzz);
85  delay(700);
86  }
87   else if (distance >= 101 && distance <=150){
88     lcd.setCursor(0,0);
89  lcd.print("Medium   Risk");
90    lcd.setCursor(0,11);
91    lcd.print("Glowing 2 LED");  
92           digitalWrite(ledPin1, HIGH);
93      digitalWrite(ledPin2, HIGH);
94     digitalWrite(ledPin3, LOW);
95    digitalWrite(ledPin4, LOW);
96      digitalWrite(norisk,   LOW);
97  tone(buzz,1200);
98  delay(100);
99  noTone(buzz);
100  delay(1200);
101     }
102  else if (distance >= 151 && distance <=250){
103    lcd.setCursor(0,0);
104   lcd.print("Low Risk");
105    lcd.setCursor(0,11);
106    lcd.print("Glowing   1 LED");  
107      digitalWrite(ledPin1, HIGH);
108      digitalWrite(ledPin2,   LOW);
109    digitalWrite(ledPin3, LOW);
110    digitalWrite(ledPin4, LOW);
111       digitalWrite(norisk, LOW);
112      tone(buzz,900);
113  delay(300);
114  noTone(buzz);
115   delay(2000);
116    }
117  
118  else{
119  
120  lcd.setCursor(0,0);
121  lcd.print("Safe   No Risk");
122  lcd.setCursor(0,11);
123     lcd.print("Glowing Safe LED");
124     digitalWrite(ledPin1, LOW);
125      digitalWrite(ledPin2, LOW);
126    digitalWrite(ledPin3,   LOW);
127    digitalWrite(ledPin4, LOW);
128  digitalWrite(norisk, HIGH);
129  noTone(buzz);
130
131     }           
132  
133}
134
135// Author Krishna Agarwal
136//For any Query/   Help Comment Below

//Author:  Krishna Agarwal
//For any Query/ Help Comment Below
#include<LiquidCrystal.h>

int   trig = 8;
int echo = 7;
long duration;
int distance;
int ledPin1=6;
int   ledPin2=9;
int ledPin3=12;
int ledPin4=13;
int norisk=A2;
int buzz=A0;
LiquidCrystal   lcd(11, 10, 5, 4, 3, 2);

void setup()
{
pinMode(trig, OUTPUT);
pinMode(echo,   INPUT);
lcd.begin(16, 2);
//pinMode(A5, INPUT);
Serial.begin(9600);
pinMode(ledPin1,OUTPUT);
   pinMode(ledPin2,OUTPUT);
  pinMode(ledPin3,OUTPUT);
  pinMode(ledPin4,OUTPUT);
   pinMode(norisk,OUTPUT);
  pinMode(buzz,OUTPUT);
  lcd.begin(16,2);
  lcd.print("Starting   System");
    delay(1500);
    lcd.clear();
    lcd.print("System On");
     delay(4000);  
} 


void loop()
{

  digitalWrite(trig,   LOW);
    delayMicroseconds(5);
    digitalWrite(trig, HIGH);
    delayMicroseconds(10);
     digitalWrite(trig, LOW);
  
    duration = pulseIn(echo, HIGH);
    distance   = duration*0.034/2;
     
    Serial.print("Distance:");
    Serial.println(distance);
   
 
  
  if (distance <= 25){
    
  lcd.setCursor(0,0);
  lcd.print("Extreme   Risk");
    lcd.setCursor(0,11);
    lcd.print("Glowing 4 LED");  
     digitalWrite(ledPin1, HIGH);
      digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3,   HIGH);
    digitalWrite(ledPin4, HIGH);
    digitalWrite(norisk, LOW);
     tone(buzz,900);
  delay(100);
  noTone(buzz);
  delay(100);
  }
   else if (distance >= 26 && distance <=100){
    lcd.setCursor(0,0);
  lcd.print("High   Risk");
    lcd.setCursor(0,11);
    lcd.print("Glowing 3 LED");  
     digitalWrite(ledPin1, HIGH);
      digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3,   HIGH);
    digitalWrite(ledPin4, LOW);
    digitalWrite(norisk, LOW);
   tone(buzz,900);
  delay(700);
  noTone(buzz);
  delay(700);
  }
   else if (distance >= 101 && distance <=150){
     lcd.setCursor(0,0);
  lcd.print("Medium   Risk");
    lcd.setCursor(0,11);
    lcd.print("Glowing 2 LED");  
           digitalWrite(ledPin1, HIGH);
      digitalWrite(ledPin2, HIGH);
     digitalWrite(ledPin3, LOW);
    digitalWrite(ledPin4, LOW);
      digitalWrite(norisk,   LOW);
  tone(buzz,1200);
  delay(100);
  noTone(buzz);
  delay(1200);
     }
  else if (distance >= 151 && distance <=250){
    lcd.setCursor(0,0);
   lcd.print("Low Risk");
    lcd.setCursor(0,11);
    lcd.print("Glowing   1 LED");  
      digitalWrite(ledPin1, HIGH);
      digitalWrite(ledPin2,   LOW);
    digitalWrite(ledPin3, LOW);
    digitalWrite(ledPin4, LOW);
       digitalWrite(norisk, LOW);
      tone(buzz,900);
  delay(300);
  noTone(buzz);
   delay(2000);
    }
  
  else{
  
  lcd.setCursor(0,0);
  lcd.print("Safe   No Risk");
  lcd.setCursor(0,11);
     lcd.print("Glowing Safe LED");
     digitalWrite(ledPin1, LOW);
      digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3,   LOW);
    digitalWrite(ledPin4, LOW);
  digitalWrite(norisk, HIGH);
  noTone(buzz);

     }           
  
}

// Author Krishna Agarwal
//For any Query/   Help Comment Below

Code

c_cpp

Upload this code From Arduino IDE software to your Board

1//Author:  Krishna Agarwal
2//For any Query/ Help Comment Below
3#include<LiquidCrystal.h>
4
5int  trig = 8;
6int echo = 7;
7long duration;
8int distance;
9int ledPin1=6;
10int  ledPin2=9;
11int ledPin3=12;
12int ledPin4=13;
13int norisk=A2;
14int buzz=A0;
15LiquidCrystal  lcd(11, 10, 5, 4, 3, 2);
16
17void setup()
18{
19pinMode(trig, OUTPUT);
20pinMode(echo,  INPUT);
21lcd.begin(16, 2);
22//pinMode(A5, INPUT);
23Serial.begin(9600);
24pinMode(ledPin1,OUTPUT);
25  pinMode(ledPin2,OUTPUT);
26  pinMode(ledPin3,OUTPUT);
27  pinMode(ledPin4,OUTPUT);
28  pinMode(norisk,OUTPUT);
29  pinMode(buzz,OUTPUT);
30  lcd.begin(16,2);
31  lcd.print("Starting  System");
32    delay(1500);
33    lcd.clear();
34    lcd.print("System On");
35    delay(4000);  
36} 
37
38
39void loop()
40{
41
42  digitalWrite(trig,  LOW);
43    delayMicroseconds(5);
44    digitalWrite(trig, HIGH);
45    delayMicroseconds(10);
46    digitalWrite(trig, LOW);
47  
48    duration = pulseIn(echo, HIGH);
49    distance  = duration*0.034/2;
50     
51    Serial.print("Distance:");
52    Serial.println(distance);
53  
54 
55  
56  if (distance <= 25){
57    
58  lcd.setCursor(0,0);
59  lcd.print("Extreme  Risk");
60    lcd.setCursor(0,11);
61    lcd.print("Glowing 4 LED");  
62    digitalWrite(ledPin1, HIGH);
63      digitalWrite(ledPin2, HIGH);
64    digitalWrite(ledPin3,  HIGH);
65    digitalWrite(ledPin4, HIGH);
66    digitalWrite(norisk, LOW);
67    tone(buzz,900);
68  delay(100);
69  noTone(buzz);
70  delay(100);
71  }
72  else if (distance >= 26 && distance <=100){
73    lcd.setCursor(0,0);
74  lcd.print("High  Risk");
75    lcd.setCursor(0,11);
76    lcd.print("Glowing 3 LED");  
77    digitalWrite(ledPin1, HIGH);
78      digitalWrite(ledPin2, HIGH);
79    digitalWrite(ledPin3,  HIGH);
80    digitalWrite(ledPin4, LOW);
81    digitalWrite(norisk, LOW);
82  tone(buzz,900);
83  delay(700);
84  noTone(buzz);
85  delay(700);
86  }
87  else if (distance >= 101 && distance <=150){
88     lcd.setCursor(0,0);
89  lcd.print("Medium  Risk");
90    lcd.setCursor(0,11);
91    lcd.print("Glowing 2 LED");  
92          digitalWrite(ledPin1, HIGH);
93      digitalWrite(ledPin2, HIGH);
94    digitalWrite(ledPin3, LOW);
95    digitalWrite(ledPin4, LOW);
96      digitalWrite(norisk,  LOW);
97  tone(buzz,1200);
98  delay(100);
99  noTone(buzz);
100  delay(1200);
101    }
102  else if (distance >= 151 && distance <=250){
103    lcd.setCursor(0,0);
104  lcd.print("Low Risk");
105    lcd.setCursor(0,11);
106    lcd.print("Glowing  1 LED");  
107      digitalWrite(ledPin1, HIGH);
108      digitalWrite(ledPin2,  LOW);
109    digitalWrite(ledPin3, LOW);
110    digitalWrite(ledPin4, LOW);
111      digitalWrite(norisk, LOW);
112      tone(buzz,900);
113  delay(300);
114  noTone(buzz);
115  delay(2000);
116    }
117  
118  else{
119  
120  lcd.setCursor(0,0);
121  lcd.print("Safe  No Risk");
122  lcd.setCursor(0,11);
123     lcd.print("Glowing Safe LED");
124    digitalWrite(ledPin1, LOW);
125      digitalWrite(ledPin2, LOW);
126    digitalWrite(ledPin3,  LOW);
127    digitalWrite(ledPin4, LOW);
128  digitalWrite(norisk, HIGH);
129  noTone(buzz);
130
131    }           
132  
133}
134
135// Author Krishna Agarwal
136//For any Query/  Help Comment Below

//Author:  Krishna Agarwal
//For any Query/ Help Comment Below
#include<LiquidCrystal.h>

int  trig = 8;
int echo = 7;
long duration;
int distance;
int ledPin1=6;
int  ledPin2=9;
int ledPin3=12;
int ledPin4=13;
int norisk=A2;
int buzz=A0;
LiquidCrystal  lcd(11, 10, 5, 4, 3, 2);

void setup()
{
pinMode(trig, OUTPUT);
pinMode(echo,  INPUT);
lcd.begin(16, 2);
//pinMode(A5, INPUT);
Serial.begin(9600);
pinMode(ledPin1,OUTPUT);
  pinMode(ledPin2,OUTPUT);
  pinMode(ledPin3,OUTPUT);
  pinMode(ledPin4,OUTPUT);
  pinMode(norisk,OUTPUT);
  pinMode(buzz,OUTPUT);
  lcd.begin(16,2);
  lcd.print("Starting  System");
    delay(1500);
    lcd.clear();
    lcd.print("System On");
    delay(4000);  
} 


void loop()
{

  digitalWrite(trig,  LOW);
    delayMicroseconds(5);
    digitalWrite(trig, HIGH);
    delayMicroseconds(10);
    digitalWrite(trig, LOW);
  
    duration = pulseIn(echo, HIGH);
    distance  = duration*0.034/2;
     
    Serial.print("Distance:");
    Serial.println(distance);
  
 
  
  if (distance <= 25){
    
  lcd.setCursor(0,0);
  lcd.print("Extreme  Risk");
    lcd.setCursor(0,11);
    lcd.print("Glowing 4 LED");  
    digitalWrite(ledPin1, HIGH);
      digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3,  HIGH);
    digitalWrite(ledPin4, HIGH);
    digitalWrite(norisk, LOW);
    tone(buzz,900);
  delay(100);
  noTone(buzz);
  delay(100);
  }
  else if (distance >= 26 && distance <=100){
    lcd.setCursor(0,0);
  lcd.print("High  Risk");
    lcd.setCursor(0,11);
    lcd.print("Glowing 3 LED");  
    digitalWrite(ledPin1, HIGH);
      digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3,  HIGH);
    digitalWrite(ledPin4, LOW);
    digitalWrite(norisk, LOW);
  tone(buzz,900);
  delay(700);
  noTone(buzz);
  delay(700);
  }
  else if (distance >= 101 && distance <=150){
     lcd.setCursor(0,0);
  lcd.print("Medium  Risk");
    lcd.setCursor(0,11);
    lcd.print("Glowing 2 LED");  
          digitalWrite(ledPin1, HIGH);
      digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, LOW);
    digitalWrite(ledPin4, LOW);
      digitalWrite(norisk,  LOW);
  tone(buzz,1200);
  delay(100);
  noTone(buzz);
  delay(1200);
    }
  else if (distance >= 151 && distance <=250){
    lcd.setCursor(0,0);
  lcd.print("Low Risk");
    lcd.setCursor(0,11);
    lcd.print("Glowing  1 LED");  
      digitalWrite(ledPin1, HIGH);
      digitalWrite(ledPin2,  LOW);
    digitalWrite(ledPin3, LOW);
    digitalWrite(ledPin4, LOW);
      digitalWrite(norisk, LOW);
      tone(buzz,900);
  delay(300);
  noTone(buzz);
  delay(2000);
    }
  
  else{
  
  lcd.setCursor(0,0);
  lcd.print("Safe  No Risk");
  lcd.setCursor(0,11);
     lcd.print("Glowing Safe LED");
    digitalWrite(ledPin1, LOW);
      digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3,  LOW);
    digitalWrite(ledPin4, LOW);
  digitalWrite(norisk, HIGH);
  noTone(buzz);

    }           
  
}

// Author Krishna Agarwal
//For any Query/  Help Comment Below

Downloadable files

Circuit Diagram

Connection OF LCD Connect GND pin of LCD to GND of Arduino Connect VCC pin of LCD to VCC of Arduino Connect V0 pin of LCD to GND of Arduino Connect RS pin of LCD to 11 of Arduino Connect R/W pin of LCD to GND of Arduino Connect E pin of LCD to 10 of Arduino Connect D4 pin of LCD to 5 of Arduino Connect D5 pin of LCD to 4 of Arduino Connect D6 pin of LCD to 3 of Arduino Connect D3 pin of LCD to 2 of Arduino Connect LCD 5v with 1 K Resistor with VCC of Arduino Connect LCD GND with GND of Arduino Connect of HC-SR04 Connect VCC of Sensor to VCC of Arduino Connect GND of Sensor to GND of Arduino Connect Echo of Sensor to 7 of Arduino Connect Trig of Sensor to 8 of Arduino Connection of Buzzer Connect Negative of Buzzer to GND of Arduino Connect Positive of Buzzer to A0 of Arduino Connection of Alerting LED Connect All led Negative to Arduino GND Connect 1 LED Positive to Arduino Pin 6 Connect 2 LED Positive to Arduino Pin 9 Connect 3 LED Positive to Arduino Pin 12 Connect 4 LED Positive to Arduino Pin 13 Connect Safe LED Negative to GND Connect Safe LED Positive to Arduino Pin A2

Circuit Diagram

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