Ultrasonic Tripwire

Create a burglar-tripwire with the ultrasonic sensor.

Feb 1, 2019

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26336 views

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22 respects

nano

ultrasonic

alarm

Devices & Components

Arduino Nano

Ultrasonic Sensor - HC-SR04 (Generic)

Male/Male Jumper Wires

Buzzer

Hardware & Tools

Computer

Software & Tools

Arduino IDE

Project description

Code

Tripwire with Nano and Ultrasonic

c_cpp

1#define trigPin 9
2#define echoPin 10
3long duration;
4int distance;
5long   firstoff;
6int distancefirst;
7
8void setup()
9{
10Serial.begin(9600);
11pinMode(trigPin,   OUTPUT);
12pinMode(echoPin, INPUT);
13delay(1000);
14digitalWrite(trigPin, HIGH);
15delayMicroseconds(10);
16digitalWrite(trigPin,   LOW);
17firstoff = pulseIn(echoPin, HIGH);
18distancefirst = firstoff*0.034/2;   // cm
19}
20
21void loop()
22{
23
24digitalWrite(trigPin, LOW);
25delayMicroseconds(2);
26digitalWrite(trigPin,   HIGH);
27delayMicroseconds(10);
28digitalWrite(trigPin, LOW);
29duration = pulseIn(echoPin,   HIGH);
30distance= duration*0.034/2; // cm
31//distance = duration * 0.0133 /   2; // in
32Serial.println(distance);
33delay(1000);
34Serial.println(distancefirst);
35
36
37
38if   (distance <= distancefirst - 5)
39{
40tone(3, 500, 500);
41delay(500);
42tone(3,   800, 500);
43delay(500);
44delay(50);
45}
46}
47

#define trigPin 9
#define echoPin 10
long duration;
int distance;
long   firstoff;
int distancefirst;

void setup()
{
Serial.begin(9600);
pinMode(trigPin,   OUTPUT);
pinMode(echoPin, INPUT);
delay(1000);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin,   LOW);
firstoff = pulseIn(echoPin, HIGH);
distancefirst = firstoff*0.034/2;   // cm
}

void loop()
{

digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin,   HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin,   HIGH);
distance= duration*0.034/2; // cm
//distance = duration * 0.0133 /   2; // in
Serial.println(distance);
delay(1000);
Serial.println(distancefirst);



if   (distance <= distancefirst - 5)
{
tone(3, 500, 500);
delay(500);
tone(3,   800, 500);
delay(500);
delay(50);
}
}

Tripwire with Nano and Ultrasonic

c_cpp

1#define trigPin 9
2#define echoPin 10
3long duration;
4int distance;
5long  firstoff;
6int distancefirst;
7
8void setup()
9{
10Serial.begin(9600);
11pinMode(trigPin,  OUTPUT);
12pinMode(echoPin, INPUT);
13delay(1000);
14digitalWrite(trigPin, HIGH);
15delayMicroseconds(10);
16digitalWrite(trigPin,  LOW);
17firstoff = pulseIn(echoPin, HIGH);
18distancefirst = firstoff*0.034/2;  // cm
19}
20
21void loop()
22{
23
24digitalWrite(trigPin, LOW);
25delayMicroseconds(2);
26digitalWrite(trigPin,  HIGH);
27delayMicroseconds(10);
28digitalWrite(trigPin, LOW);
29duration = pulseIn(echoPin,  HIGH);
30distance= duration*0.034/2; // cm
31//distance = duration * 0.0133 /  2; // in
32Serial.println(distance);
33delay(1000);
34Serial.println(distancefirst);
35
36
37
38if  (distance <= distancefirst - 5)
39{
40tone(3, 500, 500);
41delay(500);
42tone(3,  800, 500);
43delay(500);
44delay(50);
45}
46}
47

#define trigPin 9
#define echoPin 10
long duration;
int distance;
long  firstoff;
int distancefirst;

void setup()
{
Serial.begin(9600);
pinMode(trigPin,  OUTPUT);
pinMode(echoPin, INPUT);
delay(1000);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin,  LOW);
firstoff = pulseIn(echoPin, HIGH);
distancefirst = firstoff*0.034/2;  // cm
}

void loop()
{

digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin,  HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin,  HIGH);
distance= duration*0.034/2; // cm
//distance = duration * 0.0133 /  2; // in
Serial.println(distance);
delay(1000);
Serial.println(distancefirst);



if  (distance <= distancefirst - 5)
{
tone(3, 500, 500);
delay(500);
tone(3,  800, 500);
delay(500);
delay(50);
}
}

Downloadable files

How to make the circuit

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