Arduino REED Switch Tutorial

        Hello guys, welcome back to my blog. This tutorial includes what is the Arduino Reed switch and how does works Arduino Reed switch. We can use this reed switch for security systems, alarm systems, automotive projects, refrigerator doors.

What is the Arduino Reed switch?

The Reed switch is an electromagnetic switch. These are used to control the current in a circuit. This reed switch is made by inserting two or more ferrous tubes into a small glass tube. When a magnetic field is carried near this switch, the ferrous Reeds become magnetic. Then these tubes touch each other. Then electricity begins to flow through this. When the magnetic field is removed again, the reeds return to their previous state. Then the electricity stops flowing. This Reed switch acts as a gate in a circuit. We can easily control this Reed switch by magnetic fields.

There are two types of reed switches.

1.Normally open Reed switch.

2.Normally closed Reed switch.

Step 1

 

Step 2

Step 3

/*Reed sensor with Arduino UNO board.
  created by the SriTu Tech team.
  Read the code below and use it for any of your creations.
  http://srituhobby.com/
*/
#define Sensor 5
#define LED 6
 
void setup() {
  Serial.begin(9600);
  pinMode(Sensor, INPUT);
  pinMode(LED, OUTPUT);
}
 
void loop() {
  bool value = digitalRead(Sensor);
  Serial.println(value);
 
  if (value == 0) {
    digitalWrite(LED, HIGH);
    Serial.println("LED on");
  } else {
    digitalWrite(LED, LOW);
  }
}

Code explanation

void setup() {

  Serial.begin(9600);

  pinMode(Sensor, INPUT);

  pinMode(LED, OUTPUT);

}

 

In the void loop, the sensor value is read and inserted into the Boolean variable called “value”. Also, check that value with an if condition, and if its value is 0 then the LED is active, and if not the LED is off.

void loop() {

  bool value = digitalRead(Sensor);

  Serial.println(value);

 

  if (value == 0) {

    digitalWrite(LED, HIGH);

    Serial.println(“LED on”);

  } else {

    digitalWrite(LED, LOW);

  }

}

 

Step 4

Finally, select the board and port. Then, upload this code to the Arduino board.

Now you can check out this project. Use a magnetic part for that. The full video guide is below. We will meet in the next tutorial.

ARDUINO REED SWITCH Tutorial – How to use Arduino REED SWITCH