Arduino IR Receiver

Placed on 2020-04-22

Do you happen to have a few unused buttons on your remote control and do you want to use them for home automation? The Arduino nano is ideal for this. With these simple steps you will have a working IR receiver within fifteen minutes!

Arduino IR Receiver

Arduino Nano R3 - clone - with headers In stock € 8,60 IR Break Beam Sensor - 3mm LEDs Delivered in 10 to 30 days € 5,95 5mm Led warm wit - 50 stuks In stock € 2,75 Breadboard 830 points - white Out of stock € 3,00 270Ω Metal film resitor 1/4W - 10 pieces In stock € 2,65 Male-Male jumper set 65 stuks In stock € 2,95 Total € 25,90

connecting the components

To make the receiver you connect your ir-led to your Arduino , respectively pin 1 to D11, 2 to ground, 3 to 3.3v.

You connect the LED with the positive negative side to ground. We connect the positive side to a resistor. This is very important because otherwise too much current would flow through our LED. The resistance value may differ depending on the type of LED. You can calculate the resistance value with the LED characteristics.

calculating the resistance

(see photo below)

suppose we want to set our led to 10mA, then the voltage across the led should be 1.7v. If the total source voltage is 3.3v, then there must be a voltage of 1.6v across the resistor. Since the currents in a series circuit are the same through each component, 10mA will also flow through the resistor. Next, we take Omh's law to calculate the resistance of the resistor. So: U= I*R => R=U/I. R=1.6/0.01=160R. In this example, our resistor has a value of 160ohm.

programming

Before you start you must first install the library of the ir receiver. put the library in the folder: C:\--\Documents\ Arduino \libraries

Then upload the code decoder to display the codes from the receiver in the serial monitor. If you now point your remote control at the receiver and press a button, you will see the serial monitor codes appear.

link library:

https://drive.google.com/open?id=1iBWlBIPn2rXS_1roQhdSqZDVmaq1aZNw

decoder

#include <IRremote.h>// deze haalt de library .

int IRpin = 11;
IRrecv irrecv(IRpin);
decode_results results;

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // start de receiver.
}

void loop() 
{
  if (irrecv.decode(&results)) 
    {
      Serial.println(results.value, DEC); // deze print de getallen.
      irrecv.resume();   // deze zorgt ervoor dat er meerdere getallen opgehaald kunnen worden.
    }
  
  
}

if you pressed 2 buttons then open the code below. Change the text "-here-" with the 2 codes that are in the serial monitor. Please note that these are 2 different codes (one to turn the led on and one to turn them off).

led

#include <IRremote.h>

int IRpin = 11;  
int LED = 13;    // LED pin  
IRrecv irrecv(IRpin);
decode_results results;




void setup()  //hier worden alle gebruikte pinnen ingesteld
{
   pinMode(13, OUTPUT);
   Serial.begin(9600);
  irrecv.enableIRIn();                    
}
 
void loop() {
  if (irrecv.decode(&results)) {  // is er een code binnengekomen?
    Serial.println(results.value); //ja: maak een variable aan met de code.
    irrecv.resume(); 				//herhaal deze stap.
     
  if(results.value== -hier-)        //is de variable hetzelfde als de code van de aan-knop?                               
  {
             digitalWrite(13,HIGH);  //ja: laat de led branden.
  }
  else if(results.value == -hier-)   // anders: is de variable hetzelfde als de code van de uit-knop?  
  {
             digitalWrite(13,LOW);   //ja: zet de led uit.
  }
                                }
}

after uploading the code the led would turn on and off when the buttons were pressed.

have fun with it!

Ward

Posted by Ward Student industrial sciences

Arduino IR Receiver

Arduino IR Receiver

connecting the components

calculating the resistance

programming

decoder

led

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