LOCK.ME - an Innovative Way to Keep Your Things Safe

The ''LOCK.ME'' is a safe box.

We cut the box in a laser cutter but you can get any box, an acrylic one, one made of cardboard, it won't change the project in any way.

We developed a code in Arduino and when together, the code and the box, can detect when someone is close to your safe box and it beeps.

We find it very helpful because sometimes, in school or work we are afraid of letting our stuff in our lockers and this gives us the freedom to let our belongings anywhere without having to worry.

Step 1: CREATING YOUR OWN LOCK.ME

To create your own LOCK.ME you will need:

A computer - where you will develop the distance sensor code and then connect it to the rest of the project with a USB

A USB cable - used to connect the computer (with the code) to the rest of the project

A breadboard - plaque where components like the buzzer; the distance sensor and male jump wires are connected to one another

8 Male-to-male jump wires - used to connect the components

A UNO Arduino board - used to connect the code to the breadboard

A buzzer - used to buzz when someone gets close to your safe box

A distance sensor - gives information to the buzzer when someone gets close to the safe box

Step 2: CODING

Coding is the base of our project. But don't worry we are here to help you develop the best project you can.

you can access the code we used with the link below:

https://forum.arduino.cc/index.php?topic=193774.0

// defines pins numbers
const int trigPin = 9;
const int echoPin = 10;
const int buzzPin = 13; 
// 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
Serial.begin(9600); // Starts the serial communication
pinMode(buzzPin, OUTPUT); 
}
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
if(distance < 50) {
digitalWrite(buzzPin,HIGH);
} else {
digitalWrite(buzzPin,LOW);
}
Serial.print("Distance: ");
Serial.println(distance);
}

EXAMPLE:

Our safe box had 6 centimeters so we added to the code that if the distance is over 6 centimeters it will beep. This because if the box has 6 centimeters, having 6,1/6,5/7/8/9, etc means it is opened.