The Best DIY STEM Tutorials and Projects
OVERVIEW
In this project we will make Intruder Alarm using Arduino Uno, Ultrasonic Sensor and a Buzzer, we will use an ultrasonic sensor to detect movement and turn on the buzzer and LED if there is any movement.
You can follow this video and the instructions below to make this Amazing Automatic Door Project.
Video
Components Required
Here is a list of Components that we will need to make this Project.
| Sr # | Item Name | Quantity |
|---|---|---|
| 1 | Arduino Uno | 1 |
| 2 | Breadboard | 1 |
| 3 | Male to Male Jumper Wire | 8 |
| 4 | LED | 2 |
| 5 | Resistors 220k ohms | 2 |
| 6 | Buzzer | 1 |
| 7 | Ultrasonic Sensor | 1 |
Wiring Diagram
Here is a Complete Wiring Diagram along with Instructions for this Project
Program / Code
Code is Explained in the Comments of the Code
/* Intruder Alarm by --- AceLabs --- */
#define echo 2
#define trig 3
#define outA 8 // Red LED
#define outB 9 // Green LED
#define outC 10 // Buzzer
float duration; // time taken by the pulse to return back
float distance; // oneway distance travelled by the pulse
const int intruderDistance = 10;
// the minimum distance upto which the sensor is able to sense any object
void setup() {
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
pinMode(outA, OUTPUT);
digitalWrite(outA, LOW);
pinMode(outB, OUTPUT);
digitalWrite(outB, LOW);
pinMode(outC, OUTPUT);
digitalWrite(outC, LOW);
Serial.begin(9600);
}
void loop() {
time_Measurement();
distance = (float)duration * (0.0343) / 2;
// calculate the oneway distance travelled by the pulse
Serial.println(distance);
alarm_condition();
}
void time_Measurement()
{
// function to measure the time taken by the pulse to return back
digitalWrite(trig, LOW);
delayMicroseconds(2);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
}
void alarm_condition()
{
//function to execute the output commands based on the sensor input
if(distance<=intruderDistance)
{
digitalWrite(outA,HIGH);
digitalWrite(outB,LOW);
analogWrite(outC,200);}
else
{
digitalWrite(outA,LOW);
digitalWrite(outB,HIGH);
analogWrite(outC,0);
}
}
/* Intruder Alarm by --- AceLabs --- */
#define echo 2
#define trig 3
#define outA 8 // Red LED
#define outB 9 // Green LED
#define outC 10 // Buzzer
float duration; // time taken by the pulse to return back
float distance; // oneway distance travelled by the pulse
const int intruderDistance = 10;
// the minimum distance upto which the sensor is able to sense any object
void setup() {
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
pinMode(outA, OUTPUT);
digitalWrite(outA, LOW);
pinMode(outB, OUTPUT);
digitalWrite(outB, LOW);
pinMode(outC, OUTPUT);
digitalWrite(outC, LOW);
Serial.begin(9600);
}
void loop() {
time_Measurement();
distance = (float)duration * (0.0343) / 2;
// calculate the oneway distance travelled by the pulse
Serial.println(distance);
alarm_condition();
}
void time_Measurement()
{
// function to measure the time taken by the pulse to return back
digitalWrite(trig, LOW);
delayMicroseconds(2);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
}
void alarm_condition()
{
//function to execute the output commands based on the sensor input
if(distance<=intruderDistance)
{
digitalWrite(outA,HIGH);
digitalWrite(outB,LOW);
analogWrite(outC,200);}
else
{
digitalWrite(outA,LOW);
digitalWrite(outB,HIGH);
analogWrite(outC,0);
}
}
/* Intruder Alarm by --- AceLabs --- */
#define echo 2
#define trig 3
#define outA 8 // Red LED
#define outB 9 // Green LED
#define outC 10 // Buzzer
float duration; // time taken by the pulse to return back
float distance; // oneway distance travelled by the pulse
const int intruderDistance = 10;
// the minimum distance upto which the sensor is able to sense any object
void setup() {
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
pinMode(outA, OUTPUT);
digitalWrite(outA, LOW);
pinMode(outB, OUTPUT);
digitalWrite(outB, LOW);
pinMode(outC, OUTPUT);
digitalWrite(outC, LOW);
Serial.begin(9600);
}
void loop() {
time_Measurement();
distance = (float)duration * (0.0343) / 2;
// calculate the oneway distance travelled by the pulse
Serial.println(distance);
alarm_condition();
}
void time_Measurement()
{
// function to measure the time taken by the pulse to return back
digitalWrite(trig, LOW);
delayMicroseconds(2);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
}
void alarm_condition()
{
//function to execute the output commands based on the sensor input
if(distance<=intruderDistance)
{
digitalWrite(outA,HIGH);
digitalWrite(outB,LOW);
analogWrite(outC,200);}
else
{
digitalWrite(outA,LOW);
digitalWrite(outB,HIGH);
analogWrite(outC,0);
}
}
Thank you so much for going through our tutorial, we hope it was easy to follow and you enjoyed it, please share your feedback and pictures of the project (if you have made it) in the comments below .!
