Let's Close the Door

A device for solving problems that children do not close the door. I used a magnet and digital magnetic sensor.

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Things used in this project

Hardware components

Arduino Nano R3

Jumper wires (generic)

Infineon 3D Magnetic Sensor 2Go

9V battery (generic)

Software apps and online services

Arduino IDE

Story

inside

Before we thought about it, we had a discomfort because the children did not close the door.

So we have created a message box to solve the problem of not closing the door.

As the gap between the magnet and the sensor goes away, it is our intention to use the codes that are input to the sensor to emit light and sound through which the children will recognize and close the door.

So we used the principle between magnet and digital magnetic sensor.

We used simple, powerful words to help the children see at a glance.The text of the message box is "닫아".

We installed it on our classroom door.

Children are expected to close through this device in the future.

Schematics

Code

magnetic sensor

#include <Wire.h>
const int magPin=3;
const int ledPin = 13;
const int buzzerPin = 12;


void setup()
{
 Serial.begin(9600);
 Serial.println("magnet:");
 pinMode(magPin,INPUT);
 pinMode(ledPin, OUTPUT);
pinMode(buzzerPin, OUTPUT);
}
 int val;
 
 
void loop()
{
  
  
  int magStatus = digitalRead(magPin);
  
  val=digitalRead(magPin);
  Serial.println(val);
  
  
if (magStatus==HIGH){

tone(buzzerPin, 100);

digitalWrite(ledPin, HIGH);

delay(100);

noTone(buzzerPin);

digitalWrite(ledPin, LOW);

delay(100);

}

else {

noTone(buzzerPin);

digitalWrite(ledPin, LOW);

}


}