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In this project we gonna make a door alarm in the second part I added a keypad to disable the alarm.

Step 1: Watch My Video

Step 2: Parts You Need

  • Buzzer
  • Reed switch
  • Magnet
  • Arduino

Optional:

  • Keypad

Step 3: First Code (without Keypad)

This code is just a modified version of the button example sketch:

const int buttonPin = 2; // the number of the reedswitch
const int ledPin = 13; // the number of the buzzer

// variables will change:

int buttonState = 0; // variable for reading the pushbutton status

void setup() {

delay(5000);

pinMode(ledPin, OUTPUT);

pinMode(buttonPin, INPUT);

}

void loop() {

buttonState = digitalRead(buttonPin);

if (buttonState == HIGH) {

digitalWrite(ledPin, HIGH); }

}

Step 4: Second Code

http://bit.ly/keypaddooralarm

Step 5: Subscribe

If you want to view more off my projects you can subscribe to my YouTube channel! Just click on this link: http://bit.ly/1WIMuNx

About This Instructable

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Bio: TechMaker is a channel loaded with awesome Electronics Tutorials, Projects and How To´s using Arduino's
More by TechMaker_TM:Arduino Weather Station || DHT 11 Arduino door alarm with keypad Arduino realtime clock using ds1302 
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