PIR Sensor Arduino Alarm

Brandon, sorry for the huge delay, I didn’t see your comment until now. You can change the delay time upon startup to be longer if you need. Try adding a new line as the first one in the void setup that reads: delay(5000);
That’ll give you five seconds before it begins.

Hi! Nice project! wanna try it too.. but the thing is, I don’t know where to download the code.. I can’t find it….. :(

Is there code for this yet?

can you give me pir for 8051 controller

Hey, is there a way to attach a servo instead? And what changes should be made to the code for that?

My LED on pin 13 wont turn on, the PIR works fine, the only difference is I’m using a Duemilanove, any ideas.

It may not Compile, the only error is you may have to retype the this character (“motion detected”) and (“motion ended”). It has to do with the way these character shows up on the internet. Thanks I’m going to try it now.

GOOD DAY SIR i use RE200B pir sensor and the buzzer and the led is blingking and the buzzer is continuesly sounds up ….. is there a problem if i dont use the kind of pir that you use sir > ? help me please ..

are RE200B AND YOUR PIR SENSOR THE SAME ?

Hi..do you have block diagram for this project?

hie nice project… i need arduino software… pls give me dat site

Cool! I used this code to make an alarm for my sneaky 3-yo who started getting up in the middle of the night (very stealthy). I tested it last night and sure thing it worked great! I’ll include some pics.

Very nice project. In a few minutes I was able to test a PIR sensor I received today.

where is PIR sensor in proteus?

Hi,
Thanks for the wonderful tutorial on using PIR sensors. Works like charm! However, I ran into a minor issue with this. It works all perfect when I have my Arduino connected using the USB cable via my laptop. However, whenever I connect this using a 9v battery, the buzzer starts buzzing and doesn’t stop. I suspect I’m not using the right kind of battery. Using a USB cable, it works perfectly.

Any idea on how this can be fixed?

Now it’s working because I have tested it by varying two potentio meters in PIR sensor

how we can control the working temerature of pir sensors eg.my project is that detect the moving body whos temerature is above then 40 degree c. plz help me

Sir I would like to say my gratitude to you and to your helpful work. I follow the instruction carefully and it was successful. But the difference is the sensor I used is a vibration sensor (SW-420). But it just work perfectly fine. anyway Sir, thank you for the reference you made. More Power. God Bless.

hey guys

smd

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GOOD AS

Hi, I have used the exact same code and connected it accordingly and my buzzer is ringing constantly. Plaese could you identify the issue here.

Code is

// Uses a PIR sensor to detect movement, buzzes a buzzer

int ledPin = 13; // choose the pin for the LED
int inputPin = 2; // choose the input pin (for PIR sensor)
int pirState = LOW; // we start, assuming no motion detected
int val = 0; // variable for reading the pin status
int pinSpeaker = 10; //Set up a speaker on a PWM pin (digital 9, 10, or 11)

void setup() {
pinMode(ledPin, OUTPUT); // declare LED as output
pinMode(inputPin, INPUT); // declare sensor as input
pinMode(pinSpeaker, OUTPUT);
Serial.begin(9600);
}

void loop(){
val = digitalRead(inputPin); // read input value
if (val == HIGH) { // check if the input is HIGH
digitalWrite(ledPin, HIGH); // turn LED ON
playTone(300, 160);
delay(150);

if (pirState == LOW) {
// we have just turned on
Serial.println(“Motion detected!”);
// We only want to print on the output change, not state
pirState = HIGH;
}
} else {
digitalWrite(ledPin, LOW); // turn LED OFF
playTone(0, 0);
delay(300);
if (pirState == HIGH){
// we have just turned off
Serial.println(“Motion ended!”);
// We only want to print on the output change, not state
pirState = LOW;
}
}
}
// duration in mSecs, frequency in hertz
void playTone(long duration, int freq) {
duration *= 1000;
int period = (1.0 / freq) * 1000000;
long elapsed_time = 0;
while (elapsed_time < duration) {
digitalWrite(pinSpeaker,HIGH);
delayMicroseconds(period / 2);
digitalWrite(pinSpeaker, LOW);
delayMicroseconds(period / 2);
elapsed_time += (period);
}
}