প্রয়োজনীয় যন্ত্রপাতিঃ
Home Security Alarm Project কার্যপ্রনালীঃ
Arduino UNO | Ultrasonic Sensor |
Pin 9 | Trig |
Pin 10 | Echo |
Vcc | Vcc |
GND | GND |
GND | GND(Buzzer) |
Pin 7 | Buzzer(+) |
Circuit Diagram:
CODE of Home Security Alarm Project:
code:
int trigPin = 9; //connect the trigpin pin to arduino 9 num pin
int echoPin = 10;//connect the ecopin to arduino 10 num pin
int led = 7; //for switching connect this pin with relay
void setup() {
Serial.begin(9600); //baud rate
pinMode(led, OUTPUT);
pinMode(trigPin, OUTPUT); //transmitter
pinMode(echoPin, INPUT); //receiver
// put your setup code here, to run once:
}
void loop() {
long duration, distance;
digitalWrite(trigPin,HIGH);
delayMicroseconds(1000);
digitalWrite(trigPin, LOW);
duration=pulseIn(echoPin, HIGH);
distance =(duration/2)/29.1;
Serial.print(distance);
Serial.println(“CM”);
delay(10);
if((distance<=30))
{
digitalWrite(led, HIGH);
}
else if(distance>32)
{
digitalWrite(led, LOW);
}
}
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