Safety Sensor

Influences: My group had no idea what to do so we asked Jean for some ideas. We talked a lot and finally got an idea. A very common problem in school are the thefts on other person lockers.

Idea: The idea is to have a way to prevent your locker with something that isn´t a lock. The Arduino is cheaper than a lock. The educational agents will hear a loud noise if someone tries to open another person locker.

Step 1: Influences:

My group had no idea what to do so we asked Jean for some ideas. We talked a lot and finally got an idea. A very common problem in school are the thefts on other person lockers. My group decided to do a very safe locker to prevent thefts in school.

Step 2: Coding

/*
* Ultrasonic Sensor HC-SR04 and Arduino Tutorial * * by Dejan Nedelkovski, * www.HowToMechatronics.com * */ // defines pins numbers const int trigPin = 9; const int echoPin = 10; const int buzzPin = 2; const int button1 = 3; int making =0; // defines variables long duration; int distance; void setup() { pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output pinMode(echoPin, INPUT); // Sets the echoPin as an Input pinMode(buzzPin, OUTPUT); pinMode (button1, INPUT); Serial.begin(9600); // Starts the serial communication } void loop() { // Clears the trigPin digitalWrite(trigPin, LOW); delayMicroseconds(2); // Sets the trigPin on HIGH state for 10 micro seconds digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW); // Reads the echoPin, returns the sound wave travel time in microseconds duration = pulseIn(echoPin, HIGH); // Calculating the distance distance= duration*0.034/2; // Prints the distance on the Serial Monitor Serial.print("Distance: "); Serial.println(distance); making = digitalRead(button1); Serial.println(making);

if(distance>35){ digitalWrite(buzzPin, HIGH); if (making == HIGH) { digitalWrite(buzzPin, LOW); delay(10000); } } else { digitalWrite(buzzPin, LOW); } }

Step 3: How It Works

First, you need to open the door when you approximate your hand to more than 20 centimeters, the system will start to make a noise. To stop the noise there is a hidden button that can stop with the noise. The noise function is to alarm the educationals agents that there is somebody on someone's locker.

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    Nice project. If you want to make the videos a little easier for people to view, you can upload it to a site like YouTube and then embed it on the page using the Embed Video tool in the step editor. Then people will be able to view the video on the page without having to download it.